Ratio Calculator

Solves for 'x' in the proportion a : b = c : x

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=
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x

How to Use the Ratio Calculator

This calculator helps you find the missing value (x) in a proportion, which is an equation stating that two ratios are equal: a / b = c / x.

  • Enter the known values for a, b, and c in their respective input fields.
  • Value a cannot be zero, as it's used for division.
  • Click the "Calculate x" button.
  • The calculator will solve for x using the formula: x = (b * c) / a.
  • The result for x will be displayed below, along with the complete proportion.

Example: If you want to solve 2 : 5 = 8 : x, enter 2 for 'a', 5 for 'b', and 8 for 'c'. The calculator will find x = 20.