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Finding the Third Proportional to 2,786 and 6,557

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Solution

The third proportional to 2,786 and 6,557 is: 15,432.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786 : 6,557 = 6,557 : x
  2. Step 2: Convert to fraction form
    2,786/6,557 = 6,557/x
  3. Step 3: Cross multiply
    2,786x = 6,557 × 6,557
  4. Step 4: Simplify right side
    2,786x = 42,994,249
  5. Step 5: Solve for x
    x = 42,994,249/2,786
  6. Step 6: Final answer
    x = 15,432.25

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.