Solving Proportions

Solving Proportions

Presentation

•

Mathematics

•

7th - 8th Grade

•

Practice Problem

•

Easy

•

CCSS

7.RP.A.2B, 3.NF.A.3B, 7.RP.A.3

+2

Standards-aligned

Created by

Madison Garchinski

Used 48+ times

FREE Resource

6 Slides • 5 Questions

1

Solving Proportions

By Madison Garchinski

2

Please write down the steps to solve a ratio.

3

Steps:

cross multiply. 30x = 120
Solve for x by dividing by 30.
120/ 30 = 4
x = 4

4

Lets try another.

Steps:

Cross multiply. 112 = 4x
solve for x by dividing by 4.
x = 28

5

Multiple Choice

$\frac{x}{6}=\ \frac{5}{2}$

1

x= 15

2

x=2.4

3

x = 2

4

x =3

6

Multiple Choice

$\frac{4}{12}\ =\ \frac{x}{12}$

1

x =2

2

x=4

3

x=12

4

x = 1

7

Multiple Choice

$\frac{2}{x}=\ \frac{5}{10}$

1

x =4

2

x=2

3

x=10

4

x=1

8

Steps:

Cross Multiply.
3(4x) = 60
Multiply. 12x = 60
Divide by 12.
x = 5

Solving proportional Equations

9

Steps:

Cross Multiply.
5(15) = 3(4x+5)
Multiply and distribute 75 = 12x+15
Solve the 2 step equations. Subtract 15.
60 = 12x
Divide by 12.
x = 5

10

Multiple Choice

$\frac{2x}{20\ }=\ \frac{2}{4}$

1

x= 20

2

x= 4

3

x= 5

4

x = 2

11

Multiple Choice

$\frac{x+3}{6}\ =\ \frac{3}{2}$

1

x = 6

2

x= 2

3

x = 4

4

x =18

pattern-tertiary

Solving Proportions

By Madison Garchinski

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