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Finding the Fourth Proportional to 11,149.97, 15,375.47 and 7,791.55

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Solution

The fourth proportional to 11,149.97, 15,375.47 and 7,791.55 is: 10,744.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,149.97 : 15,375.47 = 7,791.55 : x
  2. Step 2: Convert to fraction form
    11,149.97/15,375.47 = 7,791.55/x
  3. Step 3: Cross multiply
    11,149.97x = 15,375.47 × 7,791.55
  4. Step 4: Simplify right side
    11,149.97x = 119,798,665.88
  5. Step 5: Solve for x
    x = 119,798,665.88/11,149.97
  6. Step 6: Final answer
    x = 10,744.31

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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.