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Finding the Fourth Proportional to 8,422.65, 12,635.60 and 2,579.31

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Solution

The fourth proportional to 8,422.65, 12,635.60 and 2,579.31 is: 3,869.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.65 : 12,635.60 = 2,579.31 : x
  2. Step 2: Convert to fraction form
    8,422.65/12,635.60 = 2,579.31/x
  3. Step 3: Cross multiply
    8,422.65x = 12,635.60 × 2,579.31
  4. Step 4: Simplify right side
    8,422.65x = 32,591,116.54
  5. Step 5: Solve for x
    x = 32,591,116.54/8,422.65
  6. Step 6: Final answer
    x = 3,869.46

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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.