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Finding the Fourth Proportional to 5,791.91, 7,992.81 and 3,139.29

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Solution

The fourth proportional to 5,791.91, 7,992.81 and 3,139.29 is: 4,332.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,791.91 : 7,992.81 = 3,139.29 : x
  2. Step 2: Convert to fraction form
    5,791.91/7,992.81 = 3,139.29/x
  3. Step 3: Cross multiply
    5,791.91x = 7,992.81 × 3,139.29
  4. Step 4: Simplify right side
    5,791.91x = 25,091,748.50
  5. Step 5: Solve for x
    x = 25,091,748.50/5,791.91
  6. Step 6: Final answer
    x = 4,332.21

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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.