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Finding the Fourth Proportional to 15,906.97, 21,951.88 and 8,737.55

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Solution

The fourth proportional to 15,906.97, 21,951.88 and 8,737.55 is: 12,057.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,906.97 : 21,951.88 = 8,737.55 : x
  2. Step 2: Convert to fraction form
    15,906.97/21,951.88 = 8,737.55/x
  3. Step 3: Cross multiply
    15,906.97x = 21,951.88 × 8,737.55
  4. Step 4: Simplify right side
    15,906.97x = 191,805,670.94
  5. Step 5: Solve for x
    x = 191,805,670.94/15,906.97
  6. Step 6: Final answer
    x = 12,057.96

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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.