Proportion Calculator
Solve one missing value in a/b = c/d using exact cross multiplication.
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What Is the Proportion Calculator?
The Proportion Calculator solves exactly one blank in a over b equals c over d and displays the cross-product relationship.
How It Works
Enter three values and leave only the unknown box blank.
When to Use It
Use it for scale, rates, recipes, equivalent fractions and similar proportional relationships.
Frequently Asked Questions
- Can A Denominator Be Zero?
- No. A ratio with a zero denominator is undefined.
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