Solving Proportions with Cross Products

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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 using cross products?

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What does it mean for two ratios to be proportional?

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Two ratios are proportional if they can be expressed as equivalent fractions.

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x = 4.

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The cross product is 3 * 8 = 24 and 4 * 6 = 24, so they are proportional.

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What is the first step in solving a proportion?

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

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k = 5.

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x = 10/3 or approximately 3.33.