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Finding the Third Proportional to 6,470 and 7,886

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Solution

The third proportional to 6,470 and 7,886 is: 9,611.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,470 : 7,886 = 7,886 : x
  2. Step 2: Convert to fraction form
    6,470/7,886 = 7,886/x
  3. Step 3: Cross multiply
    6,470x = 7,886 × 7,886
  4. Step 4: Simplify right side
    6,470x = 62,188,996
  5. Step 5: Solve for x
    x = 62,188,996/6,470
  6. Step 6: Final answer
    x = 9,611.90

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.