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Finding the Third Proportional to 3,872 and 8,364.50

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Solution

The third proportional to 3,872 and 8,364.50 is: 18,069.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872 : 8,364.50 = 8,364.50 : x
  2. Step 2: Convert to fraction form
    3,872/8,364.50 = 8,364.50/x
  3. Step 3: Cross multiply
    3,872x = 8,364.50 × 8,364.50
  4. Step 4: Simplify right side
    3,872x = 69,964,860.25
  5. Step 5: Solve for x
    x = 69,964,860.25/3,872
  6. Step 6: Final answer
    x = 18,069.44

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.