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Finding the Fourth Proportional to 18,737.49, 28,081.86 and 7,631.17

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Solution

The fourth proportional to 18,737.49, 28,081.86 and 7,631.17 is: 11,436.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.49 : 28,081.86 = 7,631.17 : x
  2. Step 2: Convert to fraction form
    18,737.49/28,081.86 = 7,631.17/x
  3. Step 3: Cross multiply
    18,737.49x = 28,081.86 × 7,631.17
  4. Step 4: Simplify right side
    18,737.49x = 214,297,447.58
  5. Step 5: Solve for x
    x = 214,297,447.58/18,737.49
  6. Step 6: Final answer
    x = 11,436.83

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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.