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Finding the Fourth Proportional to 20,425.02, 30,643.08 and 7,945.53

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Solution

The fourth proportional to 20,425.02, 30,643.08 and 7,945.53 is: 11,920.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.02 : 30,643.08 = 7,945.53 : x
  2. Step 2: Convert to fraction form
    20,425.02/30,643.08 = 7,945.53/x
  3. Step 3: Cross multiply
    20,425.02x = 30,643.08 × 7,945.53
  4. Step 4: Simplify right side
    20,425.02x = 243,475,511.43
  5. Step 5: Solve for x
    x = 243,475,511.43/20,425.02
  6. Step 6: Final answer
    x = 11,920.45

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