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Finding the Fourth Proportional to 12,216.78, 18,325.14 and 2,982.78

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Solution

The fourth proportional to 12,216.78, 18,325.14 and 2,982.78 is: 4,474.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,216.78 : 18,325.14 = 2,982.78 : x
  2. Step 2: Convert to fraction form
    12,216.78/18,325.14 = 2,982.78/x
  3. Step 3: Cross multiply
    12,216.78x = 18,325.14 × 2,982.78
  4. Step 4: Simplify right side
    12,216.78x = 54,659,861.09
  5. Step 5: Solve for x
    x = 54,659,861.09/12,216.78
  6. Step 6: Final answer
    x = 4,474.16

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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.