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Finding the Fourth Proportional to 8,662.21, 12,990.09 and 3,114.04

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Solution

The fourth proportional to 8,662.21, 12,990.09 and 3,114.04 is: 4,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,662.21 : 12,990.09 = 3,114.04 : x
  2. Step 2: Convert to fraction form
    8,662.21/12,990.09 = 3,114.04/x
  3. Step 3: Cross multiply
    8,662.21x = 12,990.09 × 3,114.04
  4. Step 4: Simplify right side
    8,662.21x = 40,451,659.86
  5. Step 5: Solve for x
    x = 40,451,659.86/8,662.21
  6. Step 6: Final answer
    x = 4,669.90

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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.