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Finding the Fourth Proportional to 20,978.98, 31,446.43 and 10,568.90

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Solution

The fourth proportional to 20,978.98, 31,446.43 and 10,568.90 is: 15,842.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,978.98 : 31,446.43 = 10,568.90 : x
  2. Step 2: Convert to fraction form
    20,978.98/31,446.43 = 10,568.90/x
  3. Step 3: Cross multiply
    20,978.98x = 31,446.43 × 10,568.90
  4. Step 4: Simplify right side
    20,978.98x = 332,354,174.03
  5. Step 5: Solve for x
    x = 332,354,174.03/20,978.98
  6. Step 6: Final answer
    x = 15,842.25

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Why These Related Problems?

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