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Finding the Fourth Proportional to 16,929.29, 25,385.39 and 9,911.42

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Solution

The fourth proportional to 16,929.29, 25,385.39 and 9,911.42 is: 14,862.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,929.29 : 25,385.39 = 9,911.42 : x
  2. Step 2: Convert to fraction form
    16,929.29/25,385.39 = 9,911.42/x
  3. Step 3: Cross multiply
    16,929.29x = 25,385.39 × 9,911.42
  4. Step 4: Simplify right side
    16,929.29x = 251,605,085.67
  5. Step 5: Solve for x
    x = 251,605,085.67/16,929.29
  6. Step 6: Final answer
    x = 14,862.12

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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.