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Finding the Third Proportional to 3,486 and 7,891.50

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Solution

The third proportional to 3,486 and 7,891.50 is: 17,864.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486 : 7,891.50 = 7,891.50 : x
  2. Step 2: Convert to fraction form
    3,486/7,891.50 = 7,891.50/x
  3. Step 3: Cross multiply
    3,486x = 7,891.50 × 7,891.50
  4. Step 4: Simplify right side
    3,486x = 62,275,772.25
  5. Step 5: Solve for x
    x = 62,275,772.25/3,486
  6. Step 6: Final answer
    x = 17,864.54

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Why These Related Problems?

These problems maintain the same ratio (2.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.