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Finding the Fourth Proportional to 7,044.68, 9,721.97 and 3,900.87

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Solution

The fourth proportional to 7,044.68, 9,721.97 and 3,900.87 is: 5,383.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,044.68 : 9,721.97 = 3,900.87 : x
  2. Step 2: Convert to fraction form
    7,044.68/9,721.97 = 3,900.87/x
  3. Step 3: Cross multiply
    7,044.68x = 9,721.97 × 3,900.87
  4. Step 4: Simplify right side
    7,044.68x = 37,924,097.92
  5. Step 5: Solve for x
    x = 37,924,097.92/7,044.68
  6. Step 6: Final answer
    x = 5,383.37

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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.