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Finding the Fourth Proportional to 5,791.42, 7,992.17 and 3,138.83

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Solution

The fourth proportional to 5,791.42, 7,992.17 and 3,138.83 is: 4,331.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,791.42 : 7,992.17 = 3,138.83 : x
  2. Step 2: Convert to fraction form
    5,791.42/7,992.17 = 3,138.83/x
  3. Step 3: Cross multiply
    5,791.42x = 7,992.17 × 3,138.83
  4. Step 4: Simplify right side
    5,791.42x = 25,086,062.96
  5. Step 5: Solve for x
    x = 25,086,062.96/5,791.42
  6. Step 6: Final answer
    x = 4,331.59

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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.