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Finding the Fourth Proportional to 8,606.86, 12,896.19 and 5,310.55

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Solution

The fourth proportional to 8,606.86, 12,896.19 and 5,310.55 is: 7,957.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,606.86 : 12,896.19 = 5,310.55 : x
  2. Step 2: Convert to fraction form
    8,606.86/12,896.19 = 5,310.55/x
  3. Step 3: Cross multiply
    8,606.86x = 12,896.19 × 5,310.55
  4. Step 4: Simplify right side
    8,606.86x = 68,485,861.80
  5. Step 5: Solve for x
    x = 68,485,861.80/8,606.86
  6. Step 6: Final answer
    x = 7,957.13

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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.