Solving Proportions

​How to SOlve a ONE Step Proportion

1. Write a proportion and use x to represent the unknown number. ​

2. Cross Multiply

3. Solve for x. ​

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1. Cross Multiply

2. Use the Distributive Property.

3. Draw a line down the middle of your equal sign. ​

4. ​Combine your Like Terms.

5. Solve for x.​

​How to SOlve a Multi Step Proportion

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​How to solve a real world proportion:

1. ​Write the proportion and let x represent the unknown number.

2. Line up the correct units so that they equal each other. EXAMPLE: apples/dollars= apples/dollars

3. Cross Multiply.

4. Solve for x.​

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​Serena is making a trail mix for her scout troop. If each scout gets 1.5 cups, how much trail mix does she need for 19 scouts? Write and solve a proportion to find your answer.

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​Scouts / Cups = Scouts / Cups

​

1 Scout / 1.5 Cups = 19 Scouts/ x Cups​

​

1/1.5 = 19/x​

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x=28.5​

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