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Finding the Fourth Proportional to 11,811.21, 17,719.56 and 4,020

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Solution

The fourth proportional to 11,811.21, 17,719.56 and 4,020 is: 6,030.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.21 : 17,719.56 = 4,020 : x
  2. Step 2: Convert to fraction form
    11,811.21/17,719.56 = 4,020/x
  3. Step 3: Cross multiply
    11,811.21x = 17,719.56 × 4,020
  4. Step 4: Simplify right side
    11,811.21x = 71,232,631.20
  5. Step 5: Solve for x
    x = 71,232,631.20/11,811.21
  6. Step 6: Final answer
    x = 6,030.93

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