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Finding the Third Proportional to 15,072 and 18,912

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Solution

The third proportional to 15,072 and 18,912 is: 23,730.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072 : 18,912 = 18,912 : x
  2. Step 2: Convert to fraction form
    15,072/18,912 = 18,912/x
  3. Step 3: Cross multiply
    15,072x = 18,912 × 18,912
  4. Step 4: Simplify right side
    15,072x = 357,663,744
  5. Step 5: Solve for x
    x = 357,663,744/15,072
  6. Step 6: Final answer
    x = 23,730.34

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Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.