Home / 13,600.60-20,400.90-8,679.85

Finding the Fourth Proportional to 13,600.60, 20,400.90 and 8,679.85

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Solution

The fourth proportional to 13,600.60, 20,400.90 and 8,679.85 is: 13,019.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,600.60 : 20,400.90 = 8,679.85 : x
  2. Step 2: Convert to fraction form
    13,600.60/20,400.90 = 8,679.85/x
  3. Step 3: Cross multiply
    13,600.60x = 20,400.90 × 8,679.85
  4. Step 4: Simplify right side
    13,600.60x = 177,076,751.87
  5. Step 5: Solve for x
    x = 177,076,751.87/13,600.60
  6. Step 6: Final answer
    x = 13,019.78

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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.