Home / 20,629.87-28,469.22-11,198.41

Finding the Fourth Proportional to 20,629.87, 28,469.22 and 11,198.41

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Solution

The fourth proportional to 20,629.87, 28,469.22 and 11,198.41 is: 15,453.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.87 : 28,469.22 = 11,198.41 : x
  2. Step 2: Convert to fraction form
    20,629.87/28,469.22 = 11,198.41/x
  3. Step 3: Cross multiply
    20,629.87x = 28,469.22 × 11,198.41
  4. Step 4: Simplify right side
    20,629.87x = 318,809,997.94
  5. Step 5: Solve for x
    x = 318,809,997.94/20,629.87
  6. Step 6: Final answer
    x = 15,453.81

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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.