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Finding the Fourth Proportional to 18,787.25, 28,191.24 and 10,471.94

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Solution

The fourth proportional to 18,787.25, 28,191.24 and 10,471.94 is: 15,713.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,787.25 : 28,191.24 = 10,471.94 : x
  2. Step 2: Convert to fraction form
    18,787.25/28,191.24 = 10,471.94/x
  3. Step 3: Cross multiply
    18,787.25x = 28,191.24 × 10,471.94
  4. Step 4: Simplify right side
    18,787.25x = 295,217,044.28
  5. Step 5: Solve for x
    x = 295,217,044.28/18,787.25
  6. Step 6: Final answer
    x = 15,713.70

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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.