Solving Proportion Equations

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Define a proportion.

Back

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

Tags

CCSS.7.RP.A.2B

Front

What is the cross-multiplication method in solving proportions?

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The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio to create an equation.

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Back

n = 21.5

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CCSS.8.EE.C.7B

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Back

n = -3.25

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CCSS.HSA.REI.A.2

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Back

x = 7

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CCSS.HSA.REI.A.2

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Back

x = 26

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CCSS.HSA.REI.A.2

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Back

m = -12

Tags

CCSS.8.EE.C.7B

Front

What is the first step in solving a proportion?

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The first step is to cross-multiply the two ratios.

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CCSS.7.RP.A.3

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What does it mean if two ratios are in proportion?

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It means that the two ratios express the same relationship between their respective quantities.

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CCSS.6.RP.A.3A

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How can you check if your solution to a proportion is correct?

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You can substitute your solution back into the original proportion to see if both sides are equal.

Tags

CCSS.7.RP.A.2A