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Finding the Fourth Proportional to 38,681.80, 58,022.70 and 20,211.40

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Solution

The fourth proportional to 38,681.80, 58,022.70 and 20,211.40 is: 30,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,681.80 : 58,022.70 = 20,211.40 : x
  2. Step 2: Convert to fraction form
    38,681.80/58,022.70 = 20,211.40/x
  3. Step 3: Cross multiply
    38,681.80x = 58,022.70 × 20,211.40
  4. Step 4: Simplify right side
    38,681.80x = 1,172,719,998.78
  5. Step 5: Solve for x
    x = 1,172,719,998.78/38,681.80
  6. Step 6: Final answer
    x = 30,317.10

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