Enter two dependent variable into the calculator to determine the constant of proportionality.

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## Constant of Proportionality Formula

The following formula is used to calculate a constant of proportionality.

C = X / Y

- Where C is the constant of proportionality
- X is a variable directly dependent on Y
- Y is a variable directly dependent on X

## Constant of Proportionality Definition

A constant of proportionality is a value that directly relates two variables two one another. For example, let’s take to variables X, and Y to be directly dependent in the form above. So C = X/Y, so X = C*Y, and Y= X/C.

## Constant of Proportionality Example

In this example, the variables are inversely proportional. Let’s say we have X which we know is 5, and we have the constant of proportionality of 2. We can then find Y by rearranging the equation Y = X/C = 5/2 = 2.5.

The constant of proportionality can be used to calculate the missing variable.

## FAQ

**What is constant of proportionality?**

A constant of proportionality represents the ratio of two different variables to one another.