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Finding the Fourth Proportional to 12,182, 18,273.60 and 3,974

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Solution

The fourth proportional to 12,182, 18,273.60 and 3,974 is: 5,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,182 : 18,273.60 = 3,974 : x
  2. Step 2: Convert to fraction form
    12,182/18,273.60 = 3,974/x
  3. Step 3: Cross multiply
    12,182x = 18,273.60 × 3,974
  4. Step 4: Simplify right side
    12,182x = 72,619,286.40
  5. Step 5: Solve for x
    x = 72,619,286.40/12,182
  6. Step 6: Final answer
    x = 5,961.20

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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.