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Finding the Fourth Proportional to 21,978.21, 32,972.76 and 6,395.88

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Solution

The fourth proportional to 21,978.21, 32,972.76 and 6,395.88 is: 9,595.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,978.21 : 32,972.76 = 6,395.88 : x
  2. Step 2: Convert to fraction form
    21,978.21/32,972.76 = 6,395.88/x
  3. Step 3: Cross multiply
    21,978.21x = 32,972.76 × 6,395.88
  4. Step 4: Simplify right side
    21,978.21x = 210,889,816.23
  5. Step 5: Solve for x
    x = 210,889,816.23/21,978.21
  6. Step 6: Final answer
    x = 9,595.40

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