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Finding the Third Proportional to 15,191 and 20,221

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Solution

The third proportional to 15,191 and 20,221 is: 26,916.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191 : 20,221 = 20,221 : x
  2. Step 2: Convert to fraction form
    15,191/20,221 = 20,221/x
  3. Step 3: Cross multiply
    15,191x = 20,221 × 20,221
  4. Step 4: Simplify right side
    15,191x = 408,888,841
  5. Step 5: Solve for x
    x = 408,888,841/15,191
  6. Step 6: Final answer
    x = 26,916.52

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.