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Finding the Third Proportional to 5,920 and 12,864

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Solution

The third proportional to 5,920 and 12,864 is: 27,953.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,920 : 12,864 = 12,864 : x
  2. Step 2: Convert to fraction form
    5,920/12,864 = 12,864/x
  3. Step 3: Cross multiply
    5,920x = 12,864 × 12,864
  4. Step 4: Simplify right side
    5,920x = 165,482,496
  5. Step 5: Solve for x
    x = 165,482,496/5,920
  6. Step 6: Final answer
    x = 27,953.12

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.