Home / 20,629.60-28,468.88-11,198.16

Finding the Fourth Proportional to 20,629.60, 28,468.88 and 11,198.16

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Solution

The fourth proportional to 20,629.60, 28,468.88 and 11,198.16 is: 15,453.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.60 : 28,468.88 = 11,198.16 : x
  2. Step 2: Convert to fraction form
    20,629.60/28,468.88 = 11,198.16/x
  3. Step 3: Cross multiply
    20,629.60x = 28,468.88 × 11,198.16
  4. Step 4: Simplify right side
    20,629.60x = 318,799,073.26
  5. Step 5: Solve for x
    x = 318,799,073.26/20,629.60
  6. Step 6: Final answer
    x = 15,453.48

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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.