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Finding the Fourth Proportional to 18,737.14, 28,142.16 and 13,787.24

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Solution

The fourth proportional to 18,737.14, 28,142.16 and 13,787.24 is: 20,707.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.14 : 28,142.16 = 13,787.24 : x
  2. Step 2: Convert to fraction form
    18,737.14/28,142.16 = 13,787.24/x
  3. Step 3: Cross multiply
    18,737.14x = 28,142.16 × 13,787.24
  4. Step 4: Simplify right side
    18,737.14x = 388,002,714.04
  5. Step 5: Solve for x
    x = 388,002,714.04/18,737.14
  6. Step 6: Final answer
    x = 20,707.68

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1.5x scale

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.