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Finding the Fourth Proportional to 13,815.76, 19,065.72 and 7,528.12

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Solution

The fourth proportional to 13,815.76, 19,065.72 and 7,528.12 is: 10,388.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.76 : 19,065.72 = 7,528.12 : x
  2. Step 2: Convert to fraction form
    13,815.76/19,065.72 = 7,528.12/x
  3. Step 3: Cross multiply
    13,815.76x = 19,065.72 × 7,528.12
  4. Step 4: Simplify right side
    13,815.76x = 143,529,028.05
  5. Step 5: Solve for x
    x = 143,529,028.05/13,815.76
  6. Step 6: Final answer
    x = 10,388.79

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