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Finding the Third Proportional to 7,816 and 18,380

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Solution

The third proportional to 7,816 and 18,380 is: 43,222.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,816 : 18,380 = 18,380 : x
  2. Step 2: Convert to fraction form
    7,816/18,380 = 18,380/x
  3. Step 3: Cross multiply
    7,816x = 18,380 × 18,380
  4. Step 4: Simplify right side
    7,816x = 337,824,400
  5. Step 5: Solve for x
    x = 337,824,400/7,816
  6. Step 6: Final answer
    x = 43,222.16

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.