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Finding the Third Proportional to 5,486 and 8,278

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Solution

The third proportional to 5,486 and 8,278 is: 12,490.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,486 : 8,278 = 8,278 : x
  2. Step 2: Convert to fraction form
    5,486/8,278 = 8,278/x
  3. Step 3: Cross multiply
    5,486x = 8,278 × 8,278
  4. Step 4: Simplify right side
    5,486x = 68,525,284
  5. Step 5: Solve for x
    x = 68,525,284/5,486
  6. Step 6: Final answer
    x = 12,490.94

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.