Home / 8,921.04-13,384.66-3,991.20

Finding the Fourth Proportional to 8,921.04, 13,384.66 and 3,991.20

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Solution

The fourth proportional to 8,921.04, 13,384.66 and 3,991.20 is: 5,988.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.04 : 13,384.66 = 3,991.20 : x
  2. Step 2: Convert to fraction form
    8,921.04/13,384.66 = 3,991.20/x
  3. Step 3: Cross multiply
    8,921.04x = 13,384.66 × 3,991.20
  4. Step 4: Simplify right side
    8,921.04x = 53,420,854.99
  5. Step 5: Solve for x
    x = 53,420,854.99/8,921.04
  6. Step 6: Final answer
    x = 5,988.19

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