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Finding the Third Proportional to 6,390 and 13,887

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Solution

The third proportional to 6,390 and 13,887 is: 30,179.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390 : 13,887 = 13,887 : x
  2. Step 2: Convert to fraction form
    6,390/13,887 = 13,887/x
  3. Step 3: Cross multiply
    6,390x = 13,887 × 13,887
  4. Step 4: Simplify right side
    6,390x = 192,848,769
  5. Step 5: Solve for x
    x = 192,848,769/6,390
  6. Step 6: Final answer
    x = 30,179.78

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.