Home / 20,372.44-28,115.70-11,761.40

Finding the Fourth Proportional to 20,372.44, 28,115.70 and 11,761.40

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Solution

The fourth proportional to 20,372.44, 28,115.70 and 11,761.40 is: 16,231.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.44 : 28,115.70 = 11,761.40 : x
  2. Step 2: Convert to fraction form
    20,372.44/28,115.70 = 11,761.40/x
  3. Step 3: Cross multiply
    20,372.44x = 28,115.70 × 11,761.40
  4. Step 4: Simplify right side
    20,372.44x = 330,679,993.98
  5. Step 5: Solve for x
    x = 330,679,993.98/20,372.44
  6. Step 6: Final answer
    x = 16,231.73

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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.