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Finding the Fourth Proportional to 31,471.92, 47,227.80 and 28,516.39

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Solution

The fourth proportional to 31,471.92, 47,227.80 and 28,516.39 is: 42,792.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,471.92 : 47,227.80 = 28,516.39 : x
  2. Step 2: Convert to fraction form
    31,471.92/47,227.80 = 28,516.39/x
  3. Step 3: Cross multiply
    31,471.92x = 47,227.80 × 28,516.39
  4. Step 4: Simplify right side
    31,471.92x = 1,346,766,363.64
  5. Step 5: Solve for x
    x = 1,346,766,363.64/31,471.92
  6. Step 6: Final answer
    x = 42,792.63

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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.