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Finding the Fourth Proportional to 18,138.88, 27,189.12 and 10,330.96

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Solution

The fourth proportional to 18,138.88, 27,189.12 and 10,330.96 is: 15,485.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.88 : 27,189.12 = 10,330.96 : x
  2. Step 2: Convert to fraction form
    18,138.88/27,189.12 = 10,330.96/x
  3. Step 3: Cross multiply
    18,138.88x = 27,189.12 × 10,330.96
  4. Step 4: Simplify right side
    18,138.88x = 280,889,711.16
  5. Step 5: Solve for x
    x = 280,889,711.16/18,138.88
  6. Step 6: Final answer
    x = 15,485.50

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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.