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Finding the Fourth Proportional to 19,997.20, 30,006.60 and 8,905.60

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Solution

The fourth proportional to 19,997.20, 30,006.60 and 8,905.60 is: 13,363.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,997.20 : 30,006.60 = 8,905.60 : x
  2. Step 2: Convert to fraction form
    19,997.20/30,006.60 = 8,905.60/x
  3. Step 3: Cross multiply
    19,997.20x = 30,006.60 × 8,905.60
  4. Step 4: Simplify right side
    19,997.20x = 267,226,776.96
  5. Step 5: Solve for x
    x = 267,226,776.96/19,997.20
  6. Step 6: Final answer
    x = 13,363.21

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