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Finding the Fourth Proportional to 15,978.32, 22,049.44 and 8,904.56

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Solution

The fourth proportional to 15,978.32, 22,049.44 and 8,904.56 is: 12,287.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.32 : 22,049.44 = 8,904.56 : x
  2. Step 2: Convert to fraction form
    15,978.32/22,049.44 = 8,904.56/x
  3. Step 3: Cross multiply
    15,978.32x = 22,049.44 × 8,904.56
  4. Step 4: Simplify right side
    15,978.32x = 196,340,561.45
  5. Step 5: Solve for x
    x = 196,340,561.45/15,978.32
  6. Step 6: Final answer
    x = 12,287.94

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