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Finding the Third Proportional to 13,889 and 20,257

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Solution

The third proportional to 13,889 and 20,257 is: 29,544.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889 : 20,257 = 20,257 : x
  2. Step 2: Convert to fraction form
    13,889/20,257 = 20,257/x
  3. Step 3: Cross multiply
    13,889x = 20,257 × 20,257
  4. Step 4: Simplify right side
    13,889x = 410,346,049
  5. Step 5: Solve for x
    x = 410,346,049/13,889
  6. Step 6: Final answer
    x = 29,544.68

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.