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Finding the Fourth Proportional to 12,165.92, 16,789.05 and 7,691.69

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Solution

The fourth proportional to 12,165.92, 16,789.05 and 7,691.69 is: 10,614.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,165.92 : 16,789.05 = 7,691.69 : x
  2. Step 2: Convert to fraction form
    12,165.92/16,789.05 = 7,691.69/x
  3. Step 3: Cross multiply
    12,165.92x = 16,789.05 × 7,691.69
  4. Step 4: Simplify right side
    12,165.92x = 129,136,167.99
  5. Step 5: Solve for x
    x = 129,136,167.99/12,165.92
  6. Step 6: Final answer
    x = 10,614.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.