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Finding the Third Proportional to 7,782 and 9,855

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Solution

The third proportional to 7,782 and 9,855 is: 12,480.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,782 : 9,855 = 9,855 : x
  2. Step 2: Convert to fraction form
    7,782/9,855 = 9,855/x
  3. Step 3: Cross multiply
    7,782x = 9,855 × 9,855
  4. Step 4: Simplify right side
    7,782x = 97,121,025
  5. Step 5: Solve for x
    x = 97,121,025/7,782
  6. Step 6: Final answer
    x = 12,480.21

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.