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Finding the Fourth Proportional to 18,120.96, 27,183.36 and 8,880

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Solution

The fourth proportional to 18,120.96, 27,183.36 and 8,880 is: 13,320.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.96 : 27,183.36 = 8,880 : x
  2. Step 2: Convert to fraction form
    18,120.96/27,183.36 = 8,880/x
  3. Step 3: Cross multiply
    18,120.96x = 27,183.36 × 8,880
  4. Step 4: Simplify right side
    18,120.96x = 241,388,236.80
  5. Step 5: Solve for x
    x = 241,388,236.80/18,120.96
  6. Step 6: Final answer
    x = 13,320.94

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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.