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Finding the Fourth Proportional to 8,604.32, 12,906.90 and 2,685.24

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Solution

The fourth proportional to 8,604.32, 12,906.90 and 2,685.24 is: 4,027.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.32 : 12,906.90 = 2,685.24 : x
  2. Step 2: Convert to fraction form
    8,604.32/12,906.90 = 2,685.24/x
  3. Step 3: Cross multiply
    8,604.32x = 12,906.90 × 2,685.24
  4. Step 4: Simplify right side
    8,604.32x = 34,658,124.16
  5. Step 5: Solve for x
    x = 34,658,124.16/8,604.32
  6. Step 6: Final answer
    x = 4,027.99

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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.