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Finding the Fourth Proportional to 13,906.73, 20,903.84 and 12,080.59

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Solution

The fourth proportional to 13,906.73, 20,903.84 and 12,080.59 is: 18,158.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.73 : 20,903.84 = 12,080.59 : x
  2. Step 2: Convert to fraction form
    13,906.73/20,903.84 = 12,080.59/x
  3. Step 3: Cross multiply
    13,906.73x = 20,903.84 × 12,080.59
  4. Step 4: Simplify right side
    13,906.73x = 252,530,720.47
  5. Step 5: Solve for x
    x = 252,530,720.47/13,906.73
  6. Step 6: Final answer
    x = 18,158.89

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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.