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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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 the cross-multiplication method?

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

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Front

What is the unit of measurement in proportions?

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Units must be consistent across the ratios being compared.

Front

If Harold took 8 quizzes in 2 weeks, how many quizzes will he take in 5 weeks?

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He will take 20 quizzes in 5 weeks.

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What is the exchange rate of Dinar to dollars if 1 Dinar = $3?

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For 20 Dinars, you would receive 60 dollars.

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How do you set up a proportion for currency exchange?

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