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Finding the Third Proportional to 11,170 and 15,385

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Solution

The third proportional to 11,170 and 15,385 is: 21,190.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,170 : 15,385 = 15,385 : x
  2. Step 2: Convert to fraction form
    11,170/15,385 = 15,385/x
  3. Step 3: Cross multiply
    11,170x = 15,385 × 15,385
  4. Step 4: Simplify right side
    11,170x = 236,698,225
  5. Step 5: Solve for x
    x = 236,698,225/11,170
  6. Step 6: Final answer
    x = 21,190.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.