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Finding the Third Proportional to 4,005 and 7,425

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Solution

The third proportional to 4,005 and 7,425 is: 13,765.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,005 : 7,425 = 7,425 : x
  2. Step 2: Convert to fraction form
    4,005/7,425 = 7,425/x
  3. Step 3: Cross multiply
    4,005x = 7,425 × 7,425
  4. Step 4: Simplify right side
    4,005x = 55,130,625
  5. Step 5: Solve for x
    x = 55,130,625/4,005
  6. Step 6: Final answer
    x = 13,765.45

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Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.