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Finding the Third Proportional to 7,820 and 16,945

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Solution

The third proportional to 7,820 and 16,945 is: 36,717.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820 : 16,945 = 16,945 : x
  2. Step 2: Convert to fraction form
    7,820/16,945 = 16,945/x
  3. Step 3: Cross multiply
    7,820x = 16,945 × 16,945
  4. Step 4: Simplify right side
    7,820x = 287,133,025
  5. Step 5: Solve for x
    x = 287,133,025/7,820
  6. Step 6: Final answer
    x = 36,717.78

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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.