Home / 12,921.12-19,381.68-3,687.12

Finding the Fourth Proportional to 12,921.12, 19,381.68 and 3,687.12

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Solution

The fourth proportional to 12,921.12, 19,381.68 and 3,687.12 is: 5,530.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.12 : 19,381.68 = 3,687.12 : x
  2. Step 2: Convert to fraction form
    12,921.12/19,381.68 = 3,687.12/x
  3. Step 3: Cross multiply
    12,921.12x = 19,381.68 × 3,687.12
  4. Step 4: Simplify right side
    12,921.12x = 71,462,579.96
  5. Step 5: Solve for x
    x = 71,462,579.96/12,921.12
  6. Step 6: Final answer
    x = 5,530.68

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