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Finding the Third Proportional to 6,407 and 9,912

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Solution

The third proportional to 6,407 and 9,912 is: 15,334.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,407 : 9,912 = 9,912 : x
  2. Step 2: Convert to fraction form
    6,407/9,912 = 9,912/x
  3. Step 3: Cross multiply
    6,407x = 9,912 × 9,912
  4. Step 4: Simplify right side
    6,407x = 98,247,744
  5. Step 5: Solve for x
    x = 98,247,744/6,407
  6. Step 6: Final answer
    x = 15,334.44

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.