Finding the Fourth Proportional to 42.11, 63.18 and 19.29
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Solution
The fourth proportional to 42.11, 63.18 and 19.29 is: 28.94
Step by Step Solution
- Step 1: Write the proportion equation
42.11 : 63.18 = 19.29 : x - Step 2: Convert to fraction form
42.11/63.18 = 19.29/x - Step 3: Cross multiply
42.11x = 63.18 × 19.29 - Step 4: Simplify right side
42.11x = 1,218.62 - Step 5: Solve for x
x = 1,218.62/42.11 - Step 6: Final answer
x = 28.94
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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.