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Finding the Fourth Proportional to 28,105.59, 42,149.05 and 9,380.41

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Solution

The fourth proportional to 28,105.59, 42,149.05 and 9,380.41 is: 14,067.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.59 : 42,149.05 = 9,380.41 : x
  2. Step 2: Convert to fraction form
    28,105.59/42,149.05 = 9,380.41/x
  3. Step 3: Cross multiply
    28,105.59x = 42,149.05 × 9,380.41
  4. Step 4: Simplify right side
    28,105.59x = 395,375,370.11
  5. Step 5: Solve for x
    x = 395,375,370.11/28,105.59
  6. Step 6: Final answer
    x = 14,067.50

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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.