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Finding the Fourth Proportional to 20,385.99, 30,539.52 and 11,932.02

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Solution

The fourth proportional to 20,385.99, 30,539.52 and 11,932.02 is: 17,874.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.99 : 30,539.52 = 11,932.02 : x
  2. Step 2: Convert to fraction form
    20,385.99/30,539.52 = 11,932.02/x
  3. Step 3: Cross multiply
    20,385.99x = 30,539.52 × 11,932.02
  4. Step 4: Simplify right side
    20,385.99x = 364,398,163.43
  5. Step 5: Solve for x
    x = 364,398,163.43/20,385.99
  6. Step 6: Final answer
    x = 17,874.93

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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.