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Finding the Fourth Proportional to 20,295.88, 30,446.28 and 7,145.56

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Solution

The fourth proportional to 20,295.88, 30,446.28 and 7,145.56 is: 10,719.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.88 : 30,446.28 = 7,145.56 : x
  2. Step 2: Convert to fraction form
    20,295.88/30,446.28 = 7,145.56/x
  3. Step 3: Cross multiply
    20,295.88x = 30,446.28 × 7,145.56
  4. Step 4: Simplify right side
    20,295.88x = 217,555,720.52
  5. Step 5: Solve for x
    x = 217,555,720.52/20,295.88
  6. Step 6: Final answer
    x = 10,719.21

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