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Finding the Third Proportional to 7,711 and 11,018

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Solution

The third proportional to 7,711 and 11,018 is: 15,743.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,711 : 11,018 = 11,018 : x
  2. Step 2: Convert to fraction form
    7,711/11,018 = 11,018/x
  3. Step 3: Cross multiply
    7,711x = 11,018 × 11,018
  4. Step 4: Simplify right side
    7,711x = 121,396,324
  5. Step 5: Solve for x
    x = 121,396,324/7,711
  6. Step 6: Final answer
    x = 15,743.27

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.