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Finding the Third Proportional to 7,717 and 12,106

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Solution

The third proportional to 7,717 and 12,106 is: 18,991.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,717 : 12,106 = 12,106 : x
  2. Step 2: Convert to fraction form
    7,717/12,106 = 12,106/x
  3. Step 3: Cross multiply
    7,717x = 12,106 × 12,106
  4. Step 4: Simplify right side
    7,717x = 146,555,236
  5. Step 5: Solve for x
    x = 146,555,236/7,717
  6. Step 6: Final answer
    x = 18,991.22

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.