Home / 8,389.28-12,579.60-3,122.12

Finding the Fourth Proportional to 8,389.28, 12,579.60 and 3,122.12

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Solution

The fourth proportional to 8,389.28, 12,579.60 and 3,122.12 is: 4,681.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.28 : 12,579.60 = 3,122.12 : x
  2. Step 2: Convert to fraction form
    8,389.28/12,579.60 = 3,122.12/x
  3. Step 3: Cross multiply
    8,389.28x = 12,579.60 × 3,122.12
  4. Step 4: Simplify right side
    8,389.28x = 39,275,020.75
  5. Step 5: Solve for x
    x = 39,275,020.75/8,389.28
  6. Step 6: Final answer
    x = 4,681.57

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