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Finding the Fourth Proportional to 18,639.40, 25,721.90 and 10,141.16

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Solution

The fourth proportional to 18,639.40, 25,721.90 and 10,141.16 is: 13,994.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.40 : 25,721.90 = 10,141.16 : x
  2. Step 2: Convert to fraction form
    18,639.40/25,721.90 = 10,141.16/x
  3. Step 3: Cross multiply
    18,639.40x = 25,721.90 × 10,141.16
  4. Step 4: Simplify right side
    18,639.40x = 260,849,903.40
  5. Step 5: Solve for x
    x = 260,849,903.40/18,639.40
  6. Step 6: Final answer
    x = 13,994.54

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