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Finding the Third Proportional to 8,426 and 12,896

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Solution

The third proportional to 8,426 and 12,896 is: 19,737.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426 : 12,896 = 12,896 : x
  2. Step 2: Convert to fraction form
    8,426/12,896 = 12,896/x
  3. Step 3: Cross multiply
    8,426x = 12,896 × 12,896
  4. Step 4: Simplify right side
    8,426x = 166,306,816
  5. Step 5: Solve for x
    x = 166,306,816/8,426
  6. Step 6: Final answer
    x = 19,737.34

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.