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Finding the Fourth Proportional to 18,651.60, 27,977.40 and 16,245.90

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Solution

The fourth proportional to 18,651.60, 27,977.40 and 16,245.90 is: 24,368.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.60 : 27,977.40 = 16,245.90 : x
  2. Step 2: Convert to fraction form
    18,651.60/27,977.40 = 16,245.90/x
  3. Step 3: Cross multiply
    18,651.60x = 27,977.40 × 16,245.90
  4. Step 4: Simplify right side
    18,651.60x = 454,518,042.66
  5. Step 5: Solve for x
    x = 454,518,042.66/18,651.60
  6. Step 6: Final answer
    x = 24,368.85

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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.