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Finding the Third Proportional to 11,199 and 12,207

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Solution

The third proportional to 11,199 and 12,207 is: 13,305.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,199 : 12,207 = 12,207 : x
  2. Step 2: Convert to fraction form
    11,199/12,207 = 12,207/x
  3. Step 3: Cross multiply
    11,199x = 12,207 × 12,207
  4. Step 4: Simplify right side
    11,199x = 149,010,849
  5. Step 5: Solve for x
    x = 149,010,849/11,199
  6. Step 6: Final answer
    x = 13,305.73

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.