Solve the proportion a/b = c/d for any missing value. Enter three known values and compute the fourth using cross-multiplication.
Solve the proportion a/b = c/d for any missing value. Enter three known values and compute the fourth using cross-multiplication.
Enter the numerator of the left side.
Enter the denominator of the left side.
Enter the numerator of the right side.
Enter the denominator of the right side.
Applies cross-multiplication to solve for the unknown in a proportion equation.
How this calculator works
Applies cross-multiplication to solve for the unknown in a proportion equation.
Common questions about this calculator
