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Finding the Third Proportional to 3,857.63 and 7,987.78

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Solution

The third proportional to 3,857.63 and 7,987.78 is: 16,539.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.63 : 7,987.78 = 7,987.78 : x
  2. Step 2: Convert to fraction form
    3,857.63/7,987.78 = 7,987.78/x
  3. Step 3: Cross multiply
    3,857.63x = 7,987.78 × 7,987.78
  4. Step 4: Simplify right side
    3,857.63x = 63,804,649.30
  5. Step 5: Solve for x
    x = 63,804,649.30/3,857.63
  6. Step 6: Final answer
    x = 16,539.88

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.