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Finding the Fourth Proportional to 18,682.31, 28,003.99 and 8,149.49

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Solution

The fourth proportional to 18,682.31, 28,003.99 and 8,149.49 is: 12,215.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,682.31 : 28,003.99 = 8,149.49 : x
  2. Step 2: Convert to fraction form
    18,682.31/28,003.99 = 8,149.49/x
  3. Step 3: Cross multiply
    18,682.31x = 28,003.99 × 8,149.49
  4. Step 4: Simplify right side
    18,682.31x = 228,218,286.10
  5. Step 5: Solve for x
    x = 228,218,286.10/18,682.31
  6. Step 6: Final answer
    x = 12,215.75

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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.