Home / 20,629.80-28,469.01-11,198.34

Finding the Fourth Proportional to 20,629.80, 28,469.01 and 11,198.34

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Solution

The fourth proportional to 20,629.80, 28,469.01 and 11,198.34 is: 15,453.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.80 : 28,469.01 = 11,198.34 : x
  2. Step 2: Convert to fraction form
    20,629.80/28,469.01 = 11,198.34/x
  3. Step 3: Cross multiply
    20,629.80x = 28,469.01 × 11,198.34
  4. Step 4: Simplify right side
    20,629.80x = 318,805,653.44
  5. Step 5: Solve for x
    x = 318,805,653.44/20,629.80
  6. Step 6: Final answer
    x = 15,453.65

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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.