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Finding the Third Proportional to 2,121 and 4,395

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Solution

The third proportional to 2,121 and 4,395 is: 9,107.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121 : 4,395 = 4,395 : x
  2. Step 2: Convert to fraction form
    2,121/4,395 = 4,395/x
  3. Step 3: Cross multiply
    2,121x = 4,395 × 4,395
  4. Step 4: Simplify right side
    2,121x = 19,316,025
  5. Step 5: Solve for x
    x = 19,316,025/2,121
  6. Step 6: Final answer
    x = 9,107.04

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.