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Finding the Fourth Proportional to 12,654.80, 18,982.20 and 3,294.80

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Solution

The fourth proportional to 12,654.80, 18,982.20 and 3,294.80 is: 4,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.80 : 18,982.20 = 3,294.80 : x
  2. Step 2: Convert to fraction form
    12,654.80/18,982.20 = 3,294.80/x
  3. Step 3: Cross multiply
    12,654.80x = 18,982.20 × 3,294.80
  4. Step 4: Simplify right side
    12,654.80x = 62,542,552.56
  5. Step 5: Solve for x
    x = 62,542,552.56/12,654.80
  6. Step 6: Final answer
    x = 4,942.20

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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.