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Finding the Third Proportional to 27,938 and 42,879

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Solution

The third proportional to 27,938 and 42,879 is: 65,810.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,938 : 42,879 = 42,879 : x
  2. Step 2: Convert to fraction form
    27,938/42,879 = 42,879/x
  3. Step 3: Cross multiply
    27,938x = 42,879 × 42,879
  4. Step 4: Simplify right side
    27,938x = 1,838,608,641
  5. Step 5: Solve for x
    x = 1,838,608,641/27,938
  6. Step 6: Final answer
    x = 65,810.32

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.