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Finding the Third Proportional to 14,115 and 21,105

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Solution

The third proportional to 14,115 and 21,105 is: 31,556.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,115 : 21,105 = 21,105 : x
  2. Step 2: Convert to fraction form
    14,115/21,105 = 21,105/x
  3. Step 3: Cross multiply
    14,115x = 21,105 × 21,105
  4. Step 4: Simplify right side
    14,115x = 445,421,025
  5. Step 5: Solve for x
    x = 445,421,025/14,115
  6. Step 6: Final answer
    x = 31,556.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.