Home / 18,515.39-25,540.85-11,348.78

Finding the Fourth Proportional to 18,515.39, 25,540.85 and 11,348.78

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Solution

The fourth proportional to 18,515.39, 25,540.85 and 11,348.78 is: 15,654.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.39 : 25,540.85 = 11,348.78 : x
  2. Step 2: Convert to fraction form
    18,515.39/25,540.85 = 11,348.78/x
  3. Step 3: Cross multiply
    18,515.39x = 25,540.85 × 11,348.78
  4. Step 4: Simplify right side
    18,515.39x = 289,857,579.89
  5. Step 5: Solve for x
    x = 289,857,579.89/18,515.39
  6. Step 6: Final answer
    x = 15,654.95

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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.