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Finding the Fourth Proportional to 16,691.43, 25,043.49 and 7,811.82

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Solution

The fourth proportional to 16,691.43, 25,043.49 and 7,811.82 is: 11,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,691.43 : 25,043.49 = 7,811.82 : x
  2. Step 2: Convert to fraction form
    16,691.43/25,043.49 = 7,811.82/x
  3. Step 3: Cross multiply
    16,691.43x = 25,043.49 × 7,811.82
  4. Step 4: Simplify right side
    16,691.43x = 195,635,236.05
  5. Step 5: Solve for x
    x = 195,635,236.05/16,691.43
  6. Step 6: Final answer
    x = 11,720.70

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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.