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Finding the Fourth Proportional to 8,662.32, 12,997.80 and 3,116.90

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Solution

The fourth proportional to 8,662.32, 12,997.80 and 3,116.90 is: 4,676.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662.32 : 12,997.80 = 3,116.90 : x
  2. Step 2: Convert to fraction form
    8,662.32/12,997.80 = 3,116.90/x
  3. Step 3: Cross multiply
    8,662.32x = 12,997.80 × 3,116.90
  4. Step 4: Simplify right side
    8,662.32x = 40,512,875.31
  5. Step 5: Solve for x
    x = 40,512,875.31/8,662.32
  6. Step 6: Final answer
    x = 4,676.91

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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.