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Finding the Fourth Proportional to 16,781.88, 25,161.78 and 9,387.12

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Solution

The fourth proportional to 16,781.88, 25,161.78 and 9,387.12 is: 14,074.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,781.88 : 25,161.78 = 9,387.12 : x
  2. Step 2: Convert to fraction form
    16,781.88/25,161.78 = 9,387.12/x
  3. Step 3: Cross multiply
    16,781.88x = 25,161.78 × 9,387.12
  4. Step 4: Simplify right side
    16,781.88x = 236,196,648.27
  5. Step 5: Solve for x
    x = 236,196,648.27/16,781.88
  6. Step 6: Final answer
    x = 14,074.50

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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.