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Finding the Fourth Proportional to 6,489.29, 9,721.62 and 3,851.22

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Solution

The fourth proportional to 6,489.29, 9,721.62 and 3,851.22 is: 5,769.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.29 : 9,721.62 = 3,851.22 : x
  2. Step 2: Convert to fraction form
    6,489.29/9,721.62 = 3,851.22/x
  3. Step 3: Cross multiply
    6,489.29x = 9,721.62 × 3,851.22
  4. Step 4: Simplify right side
    6,489.29x = 37,440,048.77
  5. Step 5: Solve for x
    x = 37,440,048.77/6,489.29
  6. Step 6: Final answer
    x = 5,769.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.