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Finding the Fourth Proportional to 8,563.62, 12,843.81 and 2,720.28

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Solution

The fourth proportional to 8,563.62, 12,843.81 and 2,720.28 is: 4,079.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,563.62 : 12,843.81 = 2,720.28 : x
  2. Step 2: Convert to fraction form
    8,563.62/12,843.81 = 2,720.28/x
  3. Step 3: Cross multiply
    8,563.62x = 12,843.81 × 2,720.28
  4. Step 4: Simplify right side
    8,563.62x = 34,938,759.47
  5. Step 5: Solve for x
    x = 34,938,759.47/8,563.62
  6. Step 6: Final answer
    x = 4,079.91

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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.