Home / 3,989.80-5,984.65-1,216.45

Finding the Fourth Proportional to 3,989.80, 5,984.65 and 1,216.45

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Solution

The fourth proportional to 3,989.80, 5,984.65 and 1,216.45 is: 1,824.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.80 : 5,984.65 = 1,216.45 : x
  2. Step 2: Convert to fraction form
    3,989.80/5,984.65 = 1,216.45/x
  3. Step 3: Cross multiply
    3,989.80x = 5,984.65 × 1,216.45
  4. Step 4: Simplify right side
    3,989.80x = 7,280,027.49
  5. Step 5: Solve for x
    x = 7,280,027.49/3,989.80
  6. Step 6: Final answer
    x = 1,824.66

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