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Finding the Fourth Proportional to 18,480.60, 27,720.90 and 16,949.70

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Solution

The fourth proportional to 18,480.60, 27,720.90 and 16,949.70 is: 25,424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.60 : 27,720.90 = 16,949.70 : x
  2. Step 2: Convert to fraction form
    18,480.60/27,720.90 = 16,949.70/x
  3. Step 3: Cross multiply
    18,480.60x = 27,720.90 × 16,949.70
  4. Step 4: Simplify right side
    18,480.60x = 469,860,938.73
  5. Step 5: Solve for x
    x = 469,860,938.73/18,480.60
  6. Step 6: Final answer
    x = 25,424.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.