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Finding the Fourth Proportional to 18,755.52, 28,132.53 and 4,715.66

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Solution

The fourth proportional to 18,755.52, 28,132.53 and 4,715.66 is: 7,073.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,755.52 : 28,132.53 = 4,715.66 : x
  2. Step 2: Convert to fraction form
    18,755.52/28,132.53 = 4,715.66/x
  3. Step 3: Cross multiply
    18,755.52x = 28,132.53 × 4,715.66
  4. Step 4: Simplify right side
    18,755.52x = 132,663,446.42
  5. Step 5: Solve for x
    x = 132,663,446.42/18,755.52
  6. Step 6: Final answer
    x = 7,073.30

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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.