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Finding the Fourth Proportional to 15,025.60, 20,734.02 and 8,311.20

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Solution

The fourth proportional to 15,025.60, 20,734.02 and 8,311.20 is: 11,468.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,025.60 : 20,734.02 = 8,311.20 : x
  2. Step 2: Convert to fraction form
    15,025.60/20,734.02 = 8,311.20/x
  3. Step 3: Cross multiply
    15,025.60x = 20,734.02 × 8,311.20
  4. Step 4: Simplify right side
    15,025.60x = 172,324,587.02
  5. Step 5: Solve for x
    x = 172,324,587.02/15,025.60
  6. Step 6: Final answer
    x = 11,468.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.