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Finding the Third Proportional to 18,728 and 40,973

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Solution

The third proportional to 18,728 and 40,973 is: 89,640.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728 : 40,973 = 40,973 : x
  2. Step 2: Convert to fraction form
    18,728/40,973 = 40,973/x
  3. Step 3: Cross multiply
    18,728x = 40,973 × 40,973
  4. Step 4: Simplify right side
    18,728x = 1,678,786,729
  5. Step 5: Solve for x
    x = 1,678,786,729/18,728
  6. Step 6: Final answer
    x = 89,640.47

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.