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Finding the Fourth Proportional to 13,659.51, 18,849.91 and 7,691.16

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Solution

The fourth proportional to 13,659.51, 18,849.91 and 7,691.16 is: 10,613.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.51 : 18,849.91 = 7,691.16 : x
  2. Step 2: Convert to fraction form
    13,659.51/18,849.91 = 7,691.16/x
  3. Step 3: Cross multiply
    13,659.51x = 18,849.91 × 7,691.16
  4. Step 4: Simplify right side
    13,659.51x = 144,977,673.80
  5. Step 5: Solve for x
    x = 144,977,673.80/13,659.51
  6. Step 6: Final answer
    x = 10,613.68

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