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Finding the Third Proportional to 7,676 and 12,722

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Solution

The third proportional to 7,676 and 12,722 is: 21,085.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,676 : 12,722 = 12,722 : x
  2. Step 2: Convert to fraction form
    7,676/12,722 = 12,722/x
  3. Step 3: Cross multiply
    7,676x = 12,722 × 12,722
  4. Step 4: Simplify right side
    7,676x = 161,849,284
  5. Step 5: Solve for x
    x = 161,849,284/7,676
  6. Step 6: Final answer
    x = 21,085.11

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.