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Finding the Fourth Proportional to 8,480.64, 12,720.81 and 3,481.95

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Solution

The fourth proportional to 8,480.64, 12,720.81 and 3,481.95 is: 5,222.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.64 : 12,720.81 = 3,481.95 : x
  2. Step 2: Convert to fraction form
    8,480.64/12,720.81 = 3,481.95/x
  3. Step 3: Cross multiply
    8,480.64x = 12,720.81 × 3,481.95
  4. Step 4: Simplify right side
    8,480.64x = 44,293,224.38
  5. Step 5: Solve for x
    x = 44,293,224.38/8,480.64
  6. Step 6: Final answer
    x = 5,222.86

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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.