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Finding the Fourth Proportional to 12,640.80, 18,933.84 and 8,244.92

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Solution

The fourth proportional to 12,640.80, 18,933.84 and 8,244.92 is: 12,349.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.80 : 18,933.84 = 8,244.92 : x
  2. Step 2: Convert to fraction form
    12,640.80/18,933.84 = 8,244.92/x
  3. Step 3: Cross multiply
    12,640.80x = 18,933.84 × 8,244.92
  4. Step 4: Simplify right side
    12,640.80x = 156,107,996.09
  5. Step 5: Solve for x
    x = 156,107,996.09/12,640.80
  6. Step 6: Final answer
    x = 12,349.53

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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.