If the product of two numbers is 36 and one number is 4, what is the other number?

To find the other number when the product of two numbers is 36 and one of the numbers is 4, you can set up the equation based on multiplication. The relationship can be expressed as:

4 * x = 36

where x represents the unknown number. To find x, you can divide both sides of this equation by 4:

x = 36 / 4

Calculating this gives:

x = 9

Thus, the other number that, when multiplied by 4, results in a product of 36 is 9. This explains why the answer is correct, as multiplying 4 by 9 yields the desired product of 36. The other choices do not satisfy the equation, as substituting any of those numbers into the equation does not yield 36 when multiplied by 4.