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Finding the Fourth Proportional to 18,072.37, 27,109.61 and 6,979.11

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Solution

The fourth proportional to 18,072.37, 27,109.61 and 6,979.11 is: 10,469.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,072.37 : 27,109.61 = 6,979.11 : x
  2. Step 2: Convert to fraction form
    18,072.37/27,109.61 = 6,979.11/x
  3. Step 3: Cross multiply
    18,072.37x = 27,109.61 × 6,979.11
  4. Step 4: Simplify right side
    18,072.37x = 189,201,011.98
  5. Step 5: Solve for x
    x = 189,201,011.98/18,072.37
  6. Step 6: Final answer
    x = 10,469.08

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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.