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Finding the Fourth Proportional to 12,402.75, 18,604.13 and 3,168.75

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Solution

The fourth proportional to 12,402.75, 18,604.13 and 3,168.75 is: 4,753.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402.75 : 18,604.13 = 3,168.75 : x
  2. Step 2: Convert to fraction form
    12,402.75/18,604.13 = 3,168.75/x
  3. Step 3: Cross multiply
    12,402.75x = 18,604.13 × 3,168.75
  4. Step 4: Simplify right side
    12,402.75x = 58,951,821.09
  5. Step 5: Solve for x
    x = 58,951,821.09/12,402.75
  6. Step 6: Final answer
    x = 4,753.13

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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.