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Finding the Fourth Proportional to 20,951.53, 28,913.22 and 11,520.70

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Solution

The fourth proportional to 20,951.53, 28,913.22 and 11,520.70 is: 15,898.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.53 : 28,913.22 = 11,520.70 : x
  2. Step 2: Convert to fraction form
    20,951.53/28,913.22 = 11,520.70/x
  3. Step 3: Cross multiply
    20,951.53x = 28,913.22 × 11,520.70
  4. Step 4: Simplify right side
    20,951.53x = 333,100,533.65
  5. Step 5: Solve for x
    x = 333,100,533.65/20,951.53
  6. Step 6: Final answer
    x = 15,898.63

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