Home / 20,245.22-27,938.50-11,170.90

Finding the Fourth Proportional to 20,245.22, 27,938.50 and 11,170.90

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Solution

The fourth proportional to 20,245.22, 27,938.50 and 11,170.90 is: 15,415.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.22 : 27,938.50 = 11,170.90 : x
  2. Step 2: Convert to fraction form
    20,245.22/27,938.50 = 11,170.90/x
  3. Step 3: Cross multiply
    20,245.22x = 27,938.50 × 11,170.90
  4. Step 4: Simplify right side
    20,245.22x = 312,098,049.96
  5. Step 5: Solve for x
    x = 312,098,049.96/20,245.22
  6. Step 6: Final answer
    x = 15,415.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.