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Finding the Fourth Proportional to 13,791.14, 20,679.14 and 6,391.52

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Solution

The fourth proportional to 13,791.14, 20,679.14 and 6,391.52 is: 9,583.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.14 : 20,679.14 = 6,391.52 : x
  2. Step 2: Convert to fraction form
    13,791.14/20,679.14 = 6,391.52/x
  3. Step 3: Cross multiply
    13,791.14x = 20,679.14 × 6,391.52
  4. Step 4: Simplify right side
    13,791.14x = 132,171,136.89
  5. Step 5: Solve for x
    x = 132,171,136.89/13,791.14
  6. Step 6: Final answer
    x = 9,583.77

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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.