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Finding the Third Proportional to 3,986.50 and 8,778

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Solution

The third proportional to 3,986.50 and 8,778 is: 19,328.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.50 : 8,778 = 8,778 : x
  2. Step 2: Convert to fraction form
    3,986.50/8,778 = 8,778/x
  3. Step 3: Cross multiply
    3,986.50x = 8,778 × 8,778
  4. Step 4: Simplify right side
    3,986.50x = 77,053,284
  5. Step 5: Solve for x
    x = 77,053,284/3,986.50
  6. Step 6: Final answer
    x = 19,328.55

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.