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Finding the Third Proportional to 13,890 and 19,797

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Solution

The third proportional to 13,890 and 19,797 is: 28,216.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890 : 19,797 = 19,797 : x
  2. Step 2: Convert to fraction form
    13,890/19,797 = 19,797/x
  3. Step 3: Cross multiply
    13,890x = 19,797 × 19,797
  4. Step 4: Simplify right side
    13,890x = 391,921,209
  5. Step 5: Solve for x
    x = 391,921,209/13,890
  6. Step 6: Final answer
    x = 28,216.07

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.