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Finding the Third Proportional to 3,640 and 8,768

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Solution

The third proportional to 3,640 and 8,768 is: 21,120.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640 : 8,768 = 8,768 : x
  2. Step 2: Convert to fraction form
    3,640/8,768 = 8,768/x
  3. Step 3: Cross multiply
    3,640x = 8,768 × 8,768
  4. Step 4: Simplify right side
    3,640x = 76,877,824
  5. Step 5: Solve for x
    x = 76,877,824/3,640
  6. Step 6: Final answer
    x = 21,120.28

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Why These Related Problems?

These problems maintain the same ratio (2.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.