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Finding the Fourth Proportional to 8,610.70, 12,915.60 and 2,766.86

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Solution

The fourth proportional to 8,610.70, 12,915.60 and 2,766.86 is: 4,150.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.70 : 12,915.60 = 2,766.86 : x
  2. Step 2: Convert to fraction form
    8,610.70/12,915.60 = 2,766.86/x
  3. Step 3: Cross multiply
    8,610.70x = 12,915.60 × 2,766.86
  4. Step 4: Simplify right side
    8,610.70x = 35,735,657.02
  5. Step 5: Solve for x
    x = 35,735,657.02/8,610.70
  6. Step 6: Final answer
    x = 4,150.15

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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.