Proportion Calculator
Calculate proportion instantly in your browser.
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What this tool does
Calculate proportion instantly in your browser. Solves the fourth term of a proportion with nonzero denominators.
How to use the Proportion Calculator
- Enter or select a in a/b=c/x.
- Enter or select b.
- Enter or select c.
- Read the calculated result; change any measurement to compare alternatives.
Formula
x=b×c/a
- a
- a in a/b=c/x
- b
- b
- c
- c
Solves the fourth term of a proportion with nonzero denominators.
Worked example
For proportion calculator, the following measurements illustrate the exact method: a in a/b=c/x: 2; b: 3; c: 4.
Inputs
- a in a/b=c/x2
- b3
- c4
Result
- Missing x6
Results explained
- Missing x
- Missing x from the formula above. Solves the fourth term of a proportion with nonzero denominators.
Frequently asked questions
x=b×c/a
Solves the fourth term of a proportion with nonzero denominators.
Where mathematically meaningful, yes. Fields specify permitted ranges and undefined operations display an error.
Exact integer calculations use safe integers; decimal calculations use browser floating point, so small rounding differences can occur.
All values remain in your browser and are never uploaded.