Home / 20,609.25-28,440.78-11,177.85

Finding the Fourth Proportional to 20,609.25, 28,440.78 and 11,177.85

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Solution

The fourth proportional to 20,609.25, 28,440.78 and 11,177.85 is: 15,425.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,609.25 : 28,440.78 = 11,177.85 : x
  2. Step 2: Convert to fraction form
    20,609.25/28,440.78 = 11,177.85/x
  3. Step 3: Cross multiply
    20,609.25x = 28,440.78 × 11,177.85
  4. Step 4: Simplify right side
    20,609.25x = 317,906,772.72
  5. Step 5: Solve for x
    x = 317,906,772.72/20,609.25
  6. Step 6: Final answer
    x = 15,425.44

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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.