Home / 20,515.38-28,311.24-11,083.96

Finding the Fourth Proportional to 20,515.38, 28,311.24 and 11,083.96

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Solution

The fourth proportional to 20,515.38, 28,311.24 and 11,083.96 is: 15,295.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.38 : 28,311.24 = 11,083.96 : x
  2. Step 2: Convert to fraction form
    20,515.38/28,311.24 = 11,083.96/x
  3. Step 3: Cross multiply
    20,515.38x = 28,311.24 × 11,083.96
  4. Step 4: Simplify right side
    20,515.38x = 313,800,651.71
  5. Step 5: Solve for x
    x = 313,800,651.71/20,515.38
  6. Step 6: Final answer
    x = 15,295.87

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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.