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Finding the Fourth Proportional to 26,147.20, 39,220.80 and 8,612.80

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Solution

The fourth proportional to 26,147.20, 39,220.80 and 8,612.80 is: 12,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,147.20 : 39,220.80 = 8,612.80 : x
  2. Step 2: Convert to fraction form
    26,147.20/39,220.80 = 8,612.80/x
  3. Step 3: Cross multiply
    26,147.20x = 39,220.80 × 8,612.80
  4. Step 4: Simplify right side
    26,147.20x = 337,800,906.24
  5. Step 5: Solve for x
    x = 337,800,906.24/26,147.20
  6. Step 6: Final answer
    x = 12,919.20

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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.