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Finding the Fourth Proportional to 10,640.54, 15,960.80 and 4,790.32

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Solution

The fourth proportional to 10,640.54, 15,960.80 and 4,790.32 is: 7,185.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640.54 : 15,960.80 = 4,790.32 : x
  2. Step 2: Convert to fraction form
    10,640.54/15,960.80 = 4,790.32/x
  3. Step 3: Cross multiply
    10,640.54x = 15,960.80 × 4,790.32
  4. Step 4: Simplify right side
    10,640.54x = 76,457,339.46
  5. Step 5: Solve for x
    x = 76,457,339.46/10,640.54
  6. Step 6: Final answer
    x = 7,185.48

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