Finding the Fourth Proportional to 42.16, 63.20 and 15.09
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Solution
The fourth proportional to 42.16, 63.20 and 15.09 is: 22.62
Step by Step Solution
- Step 1: Write the proportion equation
42.16 : 63.20 = 15.09 : x - Step 2: Convert to fraction form
42.16/63.20 = 15.09/x - Step 3: Cross multiply
42.16x = 63.20 × 15.09 - Step 4: Simplify right side
42.16x = 953.69 - Step 5: Solve for x
x = 953.69/42.16 - Step 6: Final answer
x = 22.62
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.