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Finding the Fourth Proportional to 12,183.62, 18,239.90 and 10,917.44

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Solution

The fourth proportional to 12,183.62, 18,239.90 and 10,917.44 is: 16,344.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,183.62 : 18,239.90 = 10,917.44 : x
  2. Step 2: Convert to fraction form
    12,183.62/18,239.90 = 10,917.44/x
  3. Step 3: Cross multiply
    12,183.62x = 18,239.90 × 10,917.44
  4. Step 4: Simplify right side
    12,183.62x = 199,133,003.12
  5. Step 5: Solve for x
    x = 199,133,003.12/12,183.62
  6. Step 6: Final answer
    x = 16,344.32

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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.