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Finding the Third Proportional to 4,392 and 7,809

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Solution

The third proportional to 4,392 and 7,809 is: 13,884.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,392 : 7,809 = 7,809 : x
  2. Step 2: Convert to fraction form
    4,392/7,809 = 7,809/x
  3. Step 3: Cross multiply
    4,392x = 7,809 × 7,809
  4. Step 4: Simplify right side
    4,392x = 60,980,481
  5. Step 5: Solve for x
    x = 60,980,481/4,392
  6. Step 6: Final answer
    x = 13,884.44

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.