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Finding the Fourth Proportional to 12,251.14, 18,375.74 and 3,928.94

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Solution

The fourth proportional to 12,251.14, 18,375.74 and 3,928.94 is: 5,893.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,251.14 : 18,375.74 = 3,928.94 : x
  2. Step 2: Convert to fraction form
    12,251.14/18,375.74 = 3,928.94/x
  3. Step 3: Cross multiply
    12,251.14x = 18,375.74 × 3,928.94
  4. Step 4: Simplify right side
    12,251.14x = 72,197,179.92
  5. Step 5: Solve for x
    x = 72,197,179.92/12,251.14
  6. Step 6: Final answer
    x = 5,893.10

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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.