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Finding the Fourth Proportional to 13,614.54, 18,787.59 and 8,318.22

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Solution

The fourth proportional to 13,614.54, 18,787.59 and 8,318.22 is: 11,478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,614.54 : 18,787.59 = 8,318.22 : x
  2. Step 2: Convert to fraction form
    13,614.54/18,787.59 = 8,318.22/x
  3. Step 3: Cross multiply
    13,614.54x = 18,787.59 × 8,318.22
  4. Step 4: Simplify right side
    13,614.54x = 156,279,306.89
  5. Step 5: Solve for x
    x = 156,279,306.89/13,614.54
  6. Step 6: Final answer
    x = 11,478.85

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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.