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Finding the Fourth Proportional to 20,375.91, 30,557.94 and 7,893.15

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Solution

The fourth proportional to 20,375.91, 30,557.94 and 7,893.15 is: 11,837.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.91 : 30,557.94 = 7,893.15 : x
  2. Step 2: Convert to fraction form
    20,375.91/30,557.94 = 7,893.15/x
  3. Step 3: Cross multiply
    20,375.91x = 30,557.94 × 7,893.15
  4. Step 4: Simplify right side
    20,375.91x = 241,198,404.11
  5. Step 5: Solve for x
    x = 241,198,404.11/20,375.91
  6. Step 6: Final answer
    x = 11,837.43

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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.