Home / 20,753.87-28,640.20-11,801.37

Finding the Fourth Proportional to 20,753.87, 28,640.20 and 11,801.37

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Solution

The fourth proportional to 20,753.87, 28,640.20 and 11,801.37 is: 16,285.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.87 : 28,640.20 = 11,801.37 : x
  2. Step 2: Convert to fraction form
    20,753.87/28,640.20 = 11,801.37/x
  3. Step 3: Cross multiply
    20,753.87x = 28,640.20 × 11,801.37
  4. Step 4: Simplify right side
    20,753.87x = 337,993,453.87
  5. Step 5: Solve for x
    x = 337,993,453.87/20,753.87
  6. Step 6: Final answer
    x = 16,285.81

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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.