FREE ONLINE CALCULATOR / MATH & NUMBERS
Proportion Calculator
Solve a/b = c/x for an unknown fourth value. Fast, private, and built to make every number easier.
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✦ InteractiveHow does this calculator work?
Solve a/b = c/x for an unknown fourth value. Edit the inputs and see the computed results. All calculations take place inside your browser, without submitting values to a server.
a/b = c/x → x = bc/a
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