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Finding the Fourth Proportional to 20,004.80, 29,978.40 and 8,902.40

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Solution

The fourth proportional to 20,004.80, 29,978.40 and 8,902.40 is: 13,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,004.80 : 29,978.40 = 8,902.40 : x
  2. Step 2: Convert to fraction form
    20,004.80/29,978.40 = 8,902.40/x
  3. Step 3: Cross multiply
    20,004.80x = 29,978.40 × 8,902.40
  4. Step 4: Simplify right side
    20,004.80x = 266,879,708.16
  5. Step 5: Solve for x
    x = 266,879,708.16/20,004.80
  6. Step 6: Final answer
    x = 13,340.78

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