proportions

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What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

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CCSS.7.RP.A.2A

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How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then isolate the variable.

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CCSS.6.EE.B.7

Front

What does cross-multiplication mean?

Back

Cross-multiplication involves multiplying the numerator of one fraction by the denominator of the other fraction.

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CCSS.5.NF.B.5B

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Back

x = 2.5

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CCSS.5.NF.B.5B

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Back

r = 32

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CCSS.3.NF.A.3B

CCSS.4.NF.A.1

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Back

c = 8

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CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

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Back

x = 28

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CCSS.7.RP.A.3

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x = 5

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CCSS.7.RP.A.2B

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Back

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CCSS.6.EE.B.7

Front

What is the relationship between ratios in a proportion?

Back

The ratios in a proportion are equivalent, meaning they represent the same relationship.

Tags

CCSS.6.RP.A.3A