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Finding the Fourth Proportional to 5,791.07, 7,991.69 and 3,138.48

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Solution

The fourth proportional to 5,791.07, 7,991.69 and 3,138.48 is: 4,331.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,791.07 : 7,991.69 = 3,138.48 : x
  2. Step 2: Convert to fraction form
    5,791.07/7,991.69 = 3,138.48/x
  3. Step 3: Cross multiply
    5,791.07x = 7,991.69 × 3,138.48
  4. Step 4: Simplify right side
    5,791.07x = 25,081,743.54
  5. Step 5: Solve for x
    x = 25,081,743.54/5,791.07
  6. Step 6: Final answer
    x = 4,331.11

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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.