Proportions
If a/b = c/d, then a×d = b×c (cross multiplication). Solve for any unknown by rearranging.
Proportions Calculator
Enter 3 values to solve the proportion a/b = c/d.
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Leave one field empty to solve for it
Missing Value
0
Step-by-Step
Cross Product 1 (a×d)
0
Cross Product 2 (b×c)
0
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