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Finding the Fourth Proportional to 18,021.72, 27,042.28 and 7,499

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Solution

The fourth proportional to 18,021.72, 27,042.28 and 7,499 is: 11,252.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,021.72 : 27,042.28 = 7,499 : x
  2. Step 2: Convert to fraction form
    18,021.72/27,042.28 = 7,499/x
  3. Step 3: Cross multiply
    18,021.72x = 27,042.28 × 7,499
  4. Step 4: Simplify right side
    18,021.72x = 202,790,057.72
  5. Step 5: Solve for x
    x = 202,790,057.72/18,021.72
  6. Step 6: Final answer
    x = 11,252.54

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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.