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Finding the Fourth Proportional to 7,044.22, 9,721.20 and 3,900.52

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Solution

The fourth proportional to 7,044.22, 9,721.20 and 3,900.52 is: 5,382.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,044.22 : 9,721.20 = 3,900.52 : x
  2. Step 2: Convert to fraction form
    7,044.22/9,721.20 = 3,900.52/x
  3. Step 3: Cross multiply
    7,044.22x = 9,721.20 × 3,900.52
  4. Step 4: Simplify right side
    7,044.22x = 37,917,735.02
  5. Step 5: Solve for x
    x = 37,917,735.02/7,044.22
  6. Step 6: Final answer
    x = 5,382.82

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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.