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Finding the Fourth Proportional to 21,415.20, 32,097.96 and 8,928.24

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Solution

The fourth proportional to 21,415.20, 32,097.96 and 8,928.24 is: 13,382.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.20 : 32,097.96 = 8,928.24 : x
  2. Step 2: Convert to fraction form
    21,415.20/32,097.96 = 8,928.24/x
  3. Step 3: Cross multiply
    21,415.20x = 32,097.96 × 8,928.24
  4. Step 4: Simplify right side
    21,415.20x = 286,578,290.39
  5. Step 5: Solve for x
    x = 286,578,290.39/21,415.20
  6. Step 6: Final answer
    x = 13,382.00

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