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Finding the Third Proportional to 11,108 and 13,220

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Solution

The third proportional to 11,108 and 13,220 is: 15,733.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,108 : 13,220 = 13,220 : x
  2. Step 2: Convert to fraction form
    11,108/13,220 = 13,220/x
  3. Step 3: Cross multiply
    11,108x = 13,220 × 13,220
  4. Step 4: Simplify right side
    11,108x = 174,768,400
  5. Step 5: Solve for x
    x = 174,768,400/11,108
  6. Step 6: Final answer
    x = 15,733.56

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Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.