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Finding the Fourth Proportional to 18,103.87, 24,978.65 and 10,928.11

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Solution

The fourth proportional to 18,103.87, 24,978.65 and 10,928.11 is: 15,077.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,103.87 : 24,978.65 = 10,928.11 : x
  2. Step 2: Convert to fraction form
    18,103.87/24,978.65 = 10,928.11/x
  3. Step 3: Cross multiply
    18,103.87x = 24,978.65 × 10,928.11
  4. Step 4: Simplify right side
    18,103.87x = 272,969,380.21
  5. Step 5: Solve for x
    x = 272,969,380.21/18,103.87
  6. Step 6: Final answer
    x = 15,077.96

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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.