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Finding the Fourth Proportional to 8,480.72, 12,720.68 and 2,240.88

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Solution

The fourth proportional to 8,480.72, 12,720.68 and 2,240.88 is: 3,361.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.72 : 12,720.68 = 2,240.88 : x
  2. Step 2: Convert to fraction form
    8,480.72/12,720.68 = 2,240.88/x
  3. Step 3: Cross multiply
    8,480.72x = 12,720.68 × 2,240.88
  4. Step 4: Simplify right side
    8,480.72x = 28,505,517.40
  5. Step 5: Solve for x
    x = 28,505,517.40/8,480.72
  6. Step 6: Final answer
    x = 3,361.21

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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.