Solving 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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A proportion is the same as:

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equivalent fractions.

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n = 5.5

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b = 8

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x = 15

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Which proportion would NOT represent this scenario? Bill drives 400 miles on 16 gallons of gas. How far can he drive on 3 gallons of gas?

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What is the cross-multiplication method?

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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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What does it mean for two fractions to be equivalent?

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Two fractions are equivalent if they represent the same value or proportion.

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How do you find an unknown in a proportion?

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You can find an unknown by cross-multiplying and then solving for the variable.