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Finding the Third Proportional to 7,916 and 18,330

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Solution

The third proportional to 7,916 and 18,330 is: 42,444.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,916 : 18,330 = 18,330 : x
  2. Step 2: Convert to fraction form
    7,916/18,330 = 18,330/x
  3. Step 3: Cross multiply
    7,916x = 18,330 × 18,330
  4. Step 4: Simplify right side
    7,916x = 335,988,900
  5. Step 5: Solve for x
    x = 335,988,900/7,916
  6. Step 6: Final answer
    x = 42,444.28

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.