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Finding the Fourth Proportional to 42,472.72, 63,708.96 and 11,308

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Solution

The fourth proportional to 42,472.72, 63,708.96 and 11,308 is: 16,961.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,472.72 : 63,708.96 = 11,308 : x
  2. Step 2: Convert to fraction form
    42,472.72/63,708.96 = 11,308/x
  3. Step 3: Cross multiply
    42,472.72x = 63,708.96 × 11,308
  4. Step 4: Simplify right side
    42,472.72x = 720,420,919.68
  5. Step 5: Solve for x
    x = 720,420,919.68/42,472.72
  6. Step 6: Final answer
    x = 16,961.97

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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.