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Finding the Fourth Proportional to 28,992, 39,709.17 and 27,289.78

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Solution

The fourth proportional to 28,992, 39,709.17 and 27,289.78 is: 37,377.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,992 : 39,709.17 = 27,289.78 : x
  2. Step 2: Convert to fraction form
    28,992/39,709.17 = 27,289.78/x
  3. Step 3: Cross multiply
    28,992x = 39,709.17 × 27,289.78
  4. Step 4: Simplify right side
    28,992x = 1,083,654,513.28
  5. Step 5: Solve for x
    x = 1,083,654,513.28/28,992
  6. Step 6: Final answer
    x = 37,377.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.