Answer: 75
Explanation:
You can assign a variable to the unknown value, such as x. Then, you can set up the cross product equation:
9x = 15 * 45
To solve for x, you need to isolate it by dividing both sides by 9:
x = (15 * 45) / 9
Simplify the expression by canceling out the common factors of 9 and 45:
x = (15 * 5) / 1
x = 75 / 1
x = 75
Therefore, the missing value in the proportion is 75. You can check your answer by plugging it back into the original proportion and verifying that the cross products are equal:
9/75 = 15/45
9 * 45 = 15 * 75
405 = 405
The cross products are equal, so the proportion is true.