Home / 20,788.13-28,691.12-11,834.39

Finding the Fourth Proportional to 20,788.13, 28,691.12 and 11,834.39

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Solution

The fourth proportional to 20,788.13, 28,691.12 and 11,834.39 is: 16,333.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.13 : 28,691.12 = 11,834.39 : x
  2. Step 2: Convert to fraction form
    20,788.13/28,691.12 = 11,834.39/x
  3. Step 3: Cross multiply
    20,788.13x = 28,691.12 × 11,834.39
  4. Step 4: Simplify right side
    20,788.13x = 339,541,903.62
  5. Step 5: Solve for x
    x = 339,541,903.62/20,788.13
  6. Step 6: Final answer
    x = 16,333.45

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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.