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Finding the Fourth Proportional to 21,978.40, 32,944.36 and 7,183.36

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Solution

The fourth proportional to 21,978.40, 32,944.36 and 7,183.36 is: 10,767.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978.40 : 32,944.36 = 7,183.36 : x
  2. Step 2: Convert to fraction form
    21,978.40/32,944.36 = 7,183.36/x
  3. Step 3: Cross multiply
    21,978.40x = 32,944.36 × 7,183.36
  4. Step 4: Simplify right side
    21,978.40x = 236,651,197.85
  5. Step 5: Solve for x
    x = 236,651,197.85/21,978.40
  6. Step 6: Final answer
    x = 10,767.44

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