Proportion word problems

Proportion word problems

​Steps:

​1. Highlight/circle the important numbers

​2. Underline what the numbers mean

​3. Write a word ratio

​4. Create a proportion

​5. Cross multiply

​6. Divide by the coefficient

​7. Label your answer

​The ratio of cups of sugar to cups of flour needed to bake cookies is 1:5. If Myesha uses 25 cups of flour, how much sugar is needed?

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​Open your math spiral and write down the word ratio to represent what's being compared.

Multiple Choice

What is the word ratio you wrote for what's being compared?

• $$\frac{cups}{cups}$$  

• $$\frac{flour}{sugar}$$  

• $$\frac{sugar}{flour}$$  

Multiple Choice

Write the proportion for answering this question in your math spiral. Then choose the correct proportion below.

• $$\frac{1}{5}=\frac{x}{25}$$  

• $$\frac{1}{5}=\frac{25}{x}$$  

• $$\frac{1}{25}=\frac{x}{5}$$  

Multiple Choice

The proportion to solve this question is

$$\frac{c.\ sugar}{c.\ flour\ }\ \ \frac{1}{5}=\frac{x}{25}$$  

In your math spiral, cross multiply to create a one-step equation.

What one-step equation does this create?

• 25x = 5

• 1x=125

• 5x=25

Multiple Choice

After cross multiplying you will end up with the following equation:

$$5x=25$$  

In your spiral, divide by the coefficient.

What does x equal?

• x=125

• x=5

• x=30

• x=20

Multiple Choice

The last step is to add a label to your answer.

Which of the following is the correct answer to this word problem?

• 5 cups of flour

• 5 cups of sugar

• 5

​Review these Steps:

​1. Highlight/circle the important numbers

​2. Underline what the numbers mean

​3. Write a word ratio

​4. Create a proportion

​5. Cross multiply

​6. Divide by the coefficient

​7. Label your answer

​Open a fresh page in your math spiral to set up and solve the following word problems.

Multiple Choice

Open a fresh page in your math spiral and solve this problem using the steps we just practiced.

• 13.5 weeks

• 24 ounces

• 24 weeks

• 10.6 ounces