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Finding the Fourth Proportional to 18,115.92, 27,171.08 and 7,443.36

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Solution

The fourth proportional to 18,115.92, 27,171.08 and 7,443.36 is: 11,163.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.92 : 27,171.08 = 7,443.36 : x
  2. Step 2: Convert to fraction form
    18,115.92/27,171.08 = 7,443.36/x
  3. Step 3: Cross multiply
    18,115.92x = 27,171.08 × 7,443.36
  4. Step 4: Simplify right side
    18,115.92x = 202,244,130.03
  5. Step 5: Solve for x
    x = 202,244,130.03/18,115.92
  6. Step 6: Final answer
    x = 11,163.89

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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.