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# Proportions with Variable in the Denominator

## Solve proportions when missing a value.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Proportions Using Cross Products

Learn to identify proportional ratios by cross multiplying.
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## Proportions with Variable in the Denominator

Use cross products to solve proportions with a variable in the denominator
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0

## Proportions Using Cross Products

Learn to solve proportions by using cross multiplication and finding the value of the missing variable.
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2

## Write and Solve Proportions by Using Cross-Products

Learn to write and solve proportions by using cross- products and algebra.
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1
• 1
• Real World Application

## A Golden Smile

Discover the math behind a beautiful smile.
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• Real World Application