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Finding the Fourth Proportional to 8,644.86, 12,969.60 and 3,099.78

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Solution

The fourth proportional to 8,644.86, 12,969.60 and 3,099.78 is: 4,650.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,644.86 : 12,969.60 = 3,099.78 : x
  2. Step 2: Convert to fraction form
    8,644.86/12,969.60 = 3,099.78/x
  3. Step 3: Cross multiply
    8,644.86x = 12,969.60 × 3,099.78
  4. Step 4: Simplify right side
    8,644.86x = 40,202,906.69
  5. Step 5: Solve for x
    x = 40,202,906.69/8,644.86
  6. Step 6: Final answer
    x = 4,650.50

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1.5x scale

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.