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Finding the Third Proportional to 7,928 and 11,278

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Solution

The third proportional to 7,928 and 11,278 is: 16,043.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928 : 11,278 = 11,278 : x
  2. Step 2: Convert to fraction form
    7,928/11,278 = 11,278/x
  3. Step 3: Cross multiply
    7,928x = 11,278 × 11,278
  4. Step 4: Simplify right side
    7,928x = 127,193,284
  5. Step 5: Solve for x
    x = 127,193,284/7,928
  6. Step 6: Final answer
    x = 16,043.55

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.