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Proportion Word Problems Lesson
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
Standards-aligned
Talitha Yawn
Used 3+ times
FREE Resource
13 Slides • 4 Questions
1
Buying Rates are almost always proportional!
Set up a proportion, like this:
The problem tells us 1 can costs $2.
This gives us our 1st fraction:
2
The problem also tells us that we want to
buy $10 worth:
The last spot is our unknown. Since it represents cans of pineapple
we will use "p":
3
Now we solve by using Cross Multiplication
1. Multiply diagonally and place the products equal to each other.
2. Divide by the coefficient of the variable.
4
Now we solve by using Cross Multiplication
1. Multiply diagonally and place the products equal to each other.
2. Divide by the coefficient of the variable.
3. State the answer in a sentence.
You can buy 5 cans of pineapple chunks for $10.
5
Math Response
If you can buy one can of pineapple chunks for $2, then how many can you buy with $10?
6
Buying Rates are almost always proportional!
Set up a proportion, like this:
7
Scaled images are always proportional!
Set up a proportion, like this:
8
Multiple Choice
If you can buy three bulbs of elephant garlic for $8 then how many can you buy with $32?
9
Buying Rates are almost always proportional!
Set up a proportion, like this:
10
Buying Rates are almost always proportional!
Set up a proportion, like this:
11
Multiple Choice
If you can buy one fruit basket for $30, then how many can you buy with $60?
12
Money Exchanges are always proportional!
Set up a proportion, like this:
13
14
Money Exchanges are always proportional!
Set up a proportion, like this:
15
Money Exchanges are always proportional!
Set up a proportion, like this:
16
Multiple Choice
The currency in Argentina is the Peso. The exchange rate is approximately $3 = 1 Peso. At this rate, how many Pesos would you get if you exchanged $121.10?
17
Buying Rates are almost always proportional!
Set up a proportion, like this:
The problem tells us 1 can costs $2.
This gives us our 1st fraction:
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