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Finding the Third Proportional to 13,860 and 19,521

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Solution

The third proportional to 13,860 and 19,521 is: 27,494.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860 : 19,521 = 19,521 : x
  2. Step 2: Convert to fraction form
    13,860/19,521 = 19,521/x
  3. Step 3: Cross multiply
    13,860x = 19,521 × 19,521
  4. Step 4: Simplify right side
    13,860x = 381,069,441
  5. Step 5: Solve for x
    x = 381,069,441/13,860
  6. Step 6: Final answer
    x = 27,494.19

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.