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Finding the Fourth Proportional to 8,422.08, 12,630.08 and 2,497.20

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Solution

The fourth proportional to 8,422.08, 12,630.08 and 2,497.20 is: 3,744.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.08 : 12,630.08 = 2,497.20 : x
  2. Step 2: Convert to fraction form
    8,422.08/12,630.08 = 2,497.20/x
  3. Step 3: Cross multiply
    8,422.08x = 12,630.08 × 2,497.20
  4. Step 4: Simplify right side
    8,422.08x = 31,539,835.78
  5. Step 5: Solve for x
    x = 31,539,835.78/8,422.08
  6. Step 6: Final answer
    x = 3,744.90

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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.