Home / 20,791.72-28,691.31-11,839.60

Finding the Fourth Proportional to 20,791.72, 28,691.31 and 11,839.60

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Solution

The fourth proportional to 20,791.72, 28,691.31 and 11,839.60 is: 16,337.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.72 : 28,691.31 = 11,839.60 : x
  2. Step 2: Convert to fraction form
    20,791.72/28,691.31 = 11,839.60/x
  3. Step 3: Cross multiply
    20,791.72x = 28,691.31 × 11,839.60
  4. Step 4: Simplify right side
    20,791.72x = 339,693,633.88
  5. Step 5: Solve for x
    x = 339,693,633.88/20,791.72
  6. Step 6: Final answer
    x = 16,337.93

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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.