Home / 13,728.05-18,944.70-7,440.43

Finding the Fourth Proportional to 13,728.05, 18,944.70 and 7,440.43

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Solution

The fourth proportional to 13,728.05, 18,944.70 and 7,440.43 is: 10,267.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.05 : 18,944.70 = 7,440.43 : x
  2. Step 2: Convert to fraction form
    13,728.05/18,944.70 = 7,440.43/x
  3. Step 3: Cross multiply
    13,728.05x = 18,944.70 × 7,440.43
  4. Step 4: Simplify right side
    13,728.05x = 140,956,714.22
  5. Step 5: Solve for x
    x = 140,956,714.22/13,728.05
  6. Step 6: Final answer
    x = 10,267.79

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