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Finding the Third Proportional to 7,916 and 11,137

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Solution

The third proportional to 7,916 and 11,137 is: 15,668.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916 : 11,137 = 11,137 : x
  2. Step 2: Convert to fraction form
    7,916/11,137 = 11,137/x
  3. Step 3: Cross multiply
    7,916x = 11,137 × 11,137
  4. Step 4: Simplify right side
    7,916x = 124,032,769
  5. Step 5: Solve for x
    x = 124,032,769/7,916
  6. Step 6: Final answer
    x = 15,668.62

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.