Home / 13,861.20-20,791.80-8,331.60

Finding the Fourth Proportional to 13,861.20, 20,791.80 and 8,331.60

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Solution

The fourth proportional to 13,861.20, 20,791.80 and 8,331.60 is: 12,497.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,861.20 : 20,791.80 = 8,331.60 : x
  2. Step 2: Convert to fraction form
    13,861.20/20,791.80 = 8,331.60/x
  3. Step 3: Cross multiply
    13,861.20x = 20,791.80 × 8,331.60
  4. Step 4: Simplify right side
    13,861.20x = 173,228,960.88
  5. Step 5: Solve for x
    x = 173,228,960.88/13,861.20
  6. Step 6: Final answer
    x = 12,497.40

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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.