Solving 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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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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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.

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x = 15.

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Back

x = 7.5.

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What does it mean if two ratios are equivalent?

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It means that they represent the same relationship between quantities.

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y = 10.

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x = 14.

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What is the first step in solving a proportion?

Back

The first step is to set the two ratios equal to each other.