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Finding the Fourth Proportional to 5,791.28, 7,992.04 and 3,138.76

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Solution

The fourth proportional to 5,791.28, 7,992.04 and 3,138.76 is: 4,331.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,791.28 : 7,992.04 = 3,138.76 : x
  2. Step 2: Convert to fraction form
    5,791.28/7,992.04 = 3,138.76/x
  3. Step 3: Cross multiply
    5,791.28x = 7,992.04 × 3,138.76
  4. Step 4: Simplify right side
    5,791.28x = 25,085,095.47
  5. Step 5: Solve for x
    x = 25,085,095.47/5,791.28
  6. Step 6: Final answer
    x = 4,331.53

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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.