Home / 20,629.64-28,469.49-11,198.81

Finding the Fourth Proportional to 20,629.64, 28,469.49 and 11,198.81

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Solution

The fourth proportional to 20,629.64, 28,469.49 and 11,198.81 is: 15,454.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,629.64 : 28,469.49 = 11,198.81 : x
  2. Step 2: Convert to fraction form
    20,629.64/28,469.49 = 11,198.81/x
  3. Step 3: Cross multiply
    20,629.64x = 28,469.49 × 11,198.81
  4. Step 4: Simplify right side
    20,629.64x = 318,824,409.31
  5. Step 5: Solve for x
    x = 318,824,409.31/20,629.64
  6. Step 6: Final answer
    x = 15,454.68

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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.