Find a missing value in a proportion. Given three known values of a:b = c:d, solve for the unknown variable.
Find a missing value in a proportion. Given three known values of a:b = c:d, solve for the unknown variable.
Enter the value of A.
Enter the value of B.
Enter the value of C.
Enter the value of D.
Uses the cross-multiplication property of proportions to solve for the missing value.
How this calculator works
Uses the cross-multiplication property of proportions to solve for the missing value.
Common questions about this calculator
