Home / 20,854.97-28,780.33-11,902.30

Finding the Fourth Proportional to 20,854.97, 28,780.33 and 11,902.30

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Solution

The fourth proportional to 20,854.97, 28,780.33 and 11,902.30 is: 16,425.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.97 : 28,780.33 = 11,902.30 : x
  2. Step 2: Convert to fraction form
    20,854.97/28,780.33 = 11,902.30/x
  3. Step 3: Cross multiply
    20,854.97x = 28,780.33 × 11,902.30
  4. Step 4: Simplify right side
    20,854.97x = 342,552,042.37
  5. Step 5: Solve for x
    x = 342,552,042.37/20,854.97
  6. Step 6: Final answer
    x = 16,425.44

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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.