proportions

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What is a proportion?

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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?

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

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CCSS.6.EE.B.7

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What does it mean for two ratios to be in proportion?

Back

Two ratios are in proportion if their cross products are equal.

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CCSS.7.RP.A.2A

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x = 26

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CCSS.7.RP.A.2B

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Back

Yes, this is true.

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CCSS.7.RP.A.2A

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Back

y = 22.4

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CCSS.7.RP.A.2C

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m = 90

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CCSS.7.RP.A.2B

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n = 5.5

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CCSS.7.RP.A.2B

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What is cross-multiplication?

Back

Cross-multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2