Final answer:
To find the missing number in a proportion, cross-multiply and solve for the variable.
Step-by-step explanation:
To find the missing number in this proportion, we can use the property of proportionality. In a proportion, the product of the means (the numbers in the middle) is equal to the product of the extremes (the numbers on the ends).
So, here we have:
12/18 = 24/x
Cross-multiplying, we get:
12x = 18 * 24
Simplifying the equation, we find:
x = (18 * 24) / 12
x = 36
Therefore, the missing number in the proportion is 36.
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