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Finding the Fourth Proportional to 13,485.75, 20,230.95 and 4,125.55

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Solution

The fourth proportional to 13,485.75, 20,230.95 and 4,125.55 is: 6,189.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.75 : 20,230.95 = 4,125.55 : x
  2. Step 2: Convert to fraction form
    13,485.75/20,230.95 = 4,125.55/x
  3. Step 3: Cross multiply
    13,485.75x = 20,230.95 × 4,125.55
  4. Step 4: Simplify right side
    13,485.75x = 83,463,795.77
  5. Step 5: Solve for x
    x = 83,463,795.77/13,485.75
  6. Step 6: Final answer
    x = 6,189.04

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