Home / 20,811.13-28,694.82-16,819.90

Finding the Fourth Proportional to 20,811.13, 28,694.82 and 16,819.90

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Solution

The fourth proportional to 20,811.13, 28,694.82 and 16,819.90 is: 23,191.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.13 : 28,694.82 = 16,819.90 : x
  2. Step 2: Convert to fraction form
    20,811.13/28,694.82 = 16,819.90/x
  3. Step 3: Cross multiply
    20,811.13x = 28,694.82 × 16,819.90
  4. Step 4: Simplify right side
    20,811.13x = 482,644,002.92
  5. Step 5: Solve for x
    x = 482,644,002.92/20,811.13
  6. Step 6: Final answer
    x = 23,191.63

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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.