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Finding the Fourth Proportional to 5,656.97, 7,806.61 and 3,139.47

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Solution

The fourth proportional to 5,656.97, 7,806.61 and 3,139.47 is: 4,332.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,656.97 : 7,806.61 = 3,139.47 : x
  2. Step 2: Convert to fraction form
    5,656.97/7,806.61 = 3,139.47/x
  3. Step 3: Cross multiply
    5,656.97x = 7,806.61 × 3,139.47
  4. Step 4: Simplify right side
    5,656.97x = 24,508,617.90
  5. Step 5: Solve for x
    x = 24,508,617.90/5,656.97
  6. Step 6: Final answer
    x = 4,332.46

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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.