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Finding the Fourth Proportional to 8,651.52, 12,957.12 and 4,255.20

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Solution

The fourth proportional to 8,651.52, 12,957.12 and 4,255.20 is: 6,372.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.52 : 12,957.12 = 4,255.20 : x
  2. Step 2: Convert to fraction form
    8,651.52/12,957.12 = 4,255.20/x
  3. Step 3: Cross multiply
    8,651.52x = 12,957.12 × 4,255.20
  4. Step 4: Simplify right side
    8,651.52x = 55,135,137.02
  5. Step 5: Solve for x
    x = 55,135,137.02/8,651.52
  6. Step 6: Final answer
    x = 6,372.88

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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.