Home / 18,780.82-25,920.60-10,821.70

Finding the Fourth Proportional to 18,780.82, 25,920.60 and 10,821.70

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Solution

The fourth proportional to 18,780.82, 25,920.60 and 10,821.70 is: 14,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.82 : 25,920.60 = 10,821.70 : x
  2. Step 2: Convert to fraction form
    18,780.82/25,920.60 = 10,821.70/x
  3. Step 3: Cross multiply
    18,780.82x = 25,920.60 × 10,821.70
  4. Step 4: Simplify right side
    18,780.82x = 280,504,957.02
  5. Step 5: Solve for x
    x = 280,504,957.02/18,780.82
  6. Step 6: Final answer
    x = 14,935.71

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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.