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Finding the Fourth Proportional to 13,710.42, 20,556.99 and 11,631.15

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Solution

The fourth proportional to 13,710.42, 20,556.99 and 11,631.15 is: 17,439.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.42 : 20,556.99 = 11,631.15 : x
  2. Step 2: Convert to fraction form
    13,710.42/20,556.99 = 11,631.15/x
  3. Step 3: Cross multiply
    13,710.42x = 20,556.99 × 11,631.15
  4. Step 4: Simplify right side
    13,710.42x = 239,101,434.24
  5. Step 5: Solve for x
    x = 239,101,434.24/13,710.42
  6. Step 6: Final answer
    x = 17,439.40

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