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Finding the Fourth Proportional to 16,490.56, 24,721.97 and 5,391.20

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Solution

The fourth proportional to 16,490.56, 24,721.97 and 5,391.20 is: 8,082.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,490.56 : 24,721.97 = 5,391.20 : x
  2. Step 2: Convert to fraction form
    16,490.56/24,721.97 = 5,391.20/x
  3. Step 3: Cross multiply
    16,490.56x = 24,721.97 × 5,391.20
  4. Step 4: Simplify right side
    16,490.56x = 133,280,934.10
  5. Step 5: Solve for x
    x = 133,280,934.10/16,490.56
  6. Step 6: Final answer
    x = 8,082.26

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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.