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Finding the Fourth Proportional to 7,149.90, 10,721.13 and 2,768.64

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Solution

The fourth proportional to 7,149.90, 10,721.13 and 2,768.64 is: 4,151.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.90 : 10,721.13 = 2,768.64 : x
  2. Step 2: Convert to fraction form
    7,149.90/10,721.13 = 2,768.64/x
  3. Step 3: Cross multiply
    7,149.90x = 10,721.13 × 2,768.64
  4. Step 4: Simplify right side
    7,149.90x = 29,682,949.36
  5. Step 5: Solve for x
    x = 29,682,949.36/7,149.90
  6. Step 6: Final answer
    x = 4,151.52

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