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Finding the Fourth Proportional to 19,699.50, 27,189.88 and 12,986.33

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Solution

The fourth proportional to 19,699.50, 27,189.88 and 12,986.33 is: 17,924.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,699.50 : 27,189.88 = 12,986.33 : x
  2. Step 2: Convert to fraction form
    19,699.50/27,189.88 = 12,986.33/x
  3. Step 3: Cross multiply
    19,699.50x = 27,189.88 × 12,986.33
  4. Step 4: Simplify right side
    19,699.50x = 353,096,585.93
  5. Step 5: Solve for x
    x = 353,096,585.93/19,699.50
  6. Step 6: Final answer
    x = 17,924.14

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