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Finding the Fourth Proportional to 28,891.92, 39,868.92 and 16,791.32

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Solution

The fourth proportional to 28,891.92, 39,868.92 and 16,791.32 is: 23,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,891.92 : 39,868.92 = 16,791.32 : x
  2. Step 2: Convert to fraction form
    28,891.92/39,868.92 = 16,791.32/x
  3. Step 3: Cross multiply
    28,891.92x = 39,868.92 × 16,791.32
  4. Step 4: Simplify right side
    28,891.92x = 669,451,793.77
  5. Step 5: Solve for x
    x = 669,451,793.77/28,891.92
  6. Step 6: Final answer
    x = 23,170.90

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1.5x scale

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.