Home / 20,629.72-28,469.02-11,198.28

Finding the Fourth Proportional to 20,629.72, 28,469.02 and 11,198.28

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Solution

The fourth proportional to 20,629.72, 28,469.02 and 11,198.28 is: 15,453.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.72 : 28,469.02 = 11,198.28 : x
  2. Step 2: Convert to fraction form
    20,629.72/28,469.02 = 11,198.28/x
  3. Step 3: Cross multiply
    20,629.72x = 28,469.02 × 11,198.28
  4. Step 4: Simplify right side
    20,629.72x = 318,804,057.29
  5. Step 5: Solve for x
    x = 318,804,057.29/20,629.72
  6. Step 6: Final answer
    x = 15,453.63

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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.