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Finding the Fourth Proportional to 8,489.71, 12,732.40 and 2,643.31

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Solution

The fourth proportional to 8,489.71, 12,732.40 and 2,643.31 is: 3,964.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.71 : 12,732.40 = 2,643.31 : x
  2. Step 2: Convert to fraction form
    8,489.71/12,732.40 = 2,643.31/x
  3. Step 3: Cross multiply
    8,489.71x = 12,732.40 × 2,643.31
  4. Step 4: Simplify right side
    8,489.71x = 33,655,680.24
  5. Step 5: Solve for x
    x = 33,655,680.24/8,489.71
  6. Step 6: Final answer
    x = 3,964.29

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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.