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Finding the Fourth Proportional to 18,671.80, 27,969.82 and 8,662.48

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Solution

The fourth proportional to 18,671.80, 27,969.82 and 8,662.48 is: 12,976.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.80 : 27,969.82 = 8,662.48 : x
  2. Step 2: Convert to fraction form
    18,671.80/27,969.82 = 8,662.48/x
  3. Step 3: Cross multiply
    18,671.80x = 27,969.82 × 8,662.48
  4. Step 4: Simplify right side
    18,671.80x = 242,288,006.35
  5. Step 5: Solve for x
    x = 242,288,006.35/18,671.80
  6. Step 6: Final answer
    x = 12,976.15

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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.