# Cross multiply Calculator

Here you can easily solve the three-pronged approach. A distinction is made here in two types of rule of three, once the "normal" and then "inverted" rule of three. The difference you can see the problem and the examples. ## Simple cross multiplication

### Question:

These questions ask for the number of x units of size B, which are in the same relation to C units of A

### Example:

10 construction workers digging 22 pits in a workday. How many pits dug in the same time 5 construction workers?
10 construction workers ≅ 22 pits
5 construction workers ≅ x pits
Formula: x = (C ⋅ B) / A, ie
x = (5 ⋅ 22) / 10 = 11, ie 11 pits

## Inverse cross multiplication

### Question:

These questions ask for the number of x units of size B, the result with c units of A the same product

### Example:

10 construction workers will need 22 days for a certain number of mines. How much time will need to download 5 construction workers?
10 construction workers ≅ 22 Days
5 construction workers ≅ x Days
Formula: x = (C ⋅ A) / B, ie
x = (22 ⋅ 10) / 5 = 44, ie 44 Days