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Finding the Fourth Proportional to 12,330, 18,496.44 and 4,122

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Solution

The fourth proportional to 12,330, 18,496.44 and 4,122 is: 6,183.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,330 : 18,496.44 = 4,122 : x
  2. Step 2: Convert to fraction form
    12,330/18,496.44 = 4,122/x
  3. Step 3: Cross multiply
    12,330x = 18,496.44 × 4,122
  4. Step 4: Simplify right side
    12,330x = 76,242,325.68
  5. Step 5: Solve for x
    x = 76,242,325.68/12,330
  6. Step 6: Final answer
    x = 6,183.48

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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.