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Finding the Fourth Proportional to 13,741.20, 20,611.80 and 8,200.80

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Solution

The fourth proportional to 13,741.20, 20,611.80 and 8,200.80 is: 12,301.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,741.20 : 20,611.80 = 8,200.80 : x
  2. Step 2: Convert to fraction form
    13,741.20/20,611.80 = 8,200.80/x
  3. Step 3: Cross multiply
    13,741.20x = 20,611.80 × 8,200.80
  4. Step 4: Simplify right side
    13,741.20x = 169,033,249.44
  5. Step 5: Solve for x
    x = 169,033,249.44/13,741.20
  6. Step 6: Final answer
    x = 12,301.20

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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.