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Finding the Fourth Proportional to 8,129.85, 12,180.60 and 3,738.30

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Solution

The fourth proportional to 8,129.85, 12,180.60 and 3,738.30 is: 5,600.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.85 : 12,180.60 = 3,738.30 : x
  2. Step 2: Convert to fraction form
    8,129.85/12,180.60 = 3,738.30/x
  3. Step 3: Cross multiply
    8,129.85x = 12,180.60 × 3,738.30
  4. Step 4: Simplify right side
    8,129.85x = 45,534,736.98
  5. Step 5: Solve for x
    x = 45,534,736.98/8,129.85
  6. Step 6: Final answer
    x = 5,600.93

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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.