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Finding the Fourth Proportional to 20,463.68, 30,695.16 and 8,151.68

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Solution

The fourth proportional to 20,463.68, 30,695.16 and 8,151.68 is: 12,227.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,463.68 : 30,695.16 = 8,151.68 : x
  2. Step 2: Convert to fraction form
    20,463.68/30,695.16 = 8,151.68/x
  3. Step 3: Cross multiply
    20,463.68x = 30,695.16 × 8,151.68
  4. Step 4: Simplify right side
    20,463.68x = 250,217,121.87
  5. Step 5: Solve for x
    x = 250,217,121.87/20,463.68
  6. Step 6: Final answer
    x = 12,227.38

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1.5x scale

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.