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Finding the Third Proportional to 12,712 and 13,912

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Solution

The third proportional to 12,712 and 13,912 is: 15,225.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712 : 13,912 = 13,912 : x
  2. Step 2: Convert to fraction form
    12,712/13,912 = 13,912/x
  3. Step 3: Cross multiply
    12,712x = 13,912 × 13,912
  4. Step 4: Simplify right side
    12,712x = 193,543,744
  5. Step 5: Solve for x
    x = 193,543,744/12,712
  6. Step 6: Final answer
    x = 15,225.28

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.