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Finding the Fourth Proportional to 19,375.54, 29,074.52 and 8,129.87

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Solution

The fourth proportional to 19,375.54, 29,074.52 and 8,129.87 is: 12,199.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,375.54 : 29,074.52 = 8,129.87 : x
  2. Step 2: Convert to fraction form
    19,375.54/29,074.52 = 8,129.87/x
  3. Step 3: Cross multiply
    19,375.54x = 29,074.52 × 8,129.87
  4. Step 4: Simplify right side
    19,375.54x = 236,372,067.91
  5. Step 5: Solve for x
    x = 236,372,067.91/19,375.54
  6. Step 6: Final answer
    x = 12,199.51

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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.