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Finding the Fourth Proportional to 8,586.55, 12,868.11 and 5,255.96

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Solution

The fourth proportional to 8,586.55, 12,868.11 and 5,255.96 is: 7,876.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.55 : 12,868.11 = 5,255.96 : x
  2. Step 2: Convert to fraction form
    8,586.55/12,868.11 = 5,255.96/x
  3. Step 3: Cross multiply
    8,586.55x = 12,868.11 × 5,255.96
  4. Step 4: Simplify right side
    8,586.55x = 67,634,207.10
  5. Step 5: Solve for x
    x = 67,634,207.10/8,586.55
  6. Step 6: Final answer
    x = 7,876.76

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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.