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Finding the Fourth Proportional to 20,912.31, 28,846.94 and 12,523.95

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Solution

The fourth proportional to 20,912.31, 28,846.94 and 12,523.95 is: 17,275.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.31 : 28,846.94 = 12,523.95 : x
  2. Step 2: Convert to fraction form
    20,912.31/28,846.94 = 12,523.95/x
  3. Step 3: Cross multiply
    20,912.31x = 28,846.94 × 12,523.95
  4. Step 4: Simplify right side
    20,912.31x = 361,277,571.59
  5. Step 5: Solve for x
    x = 361,277,571.59/20,912.31
  6. Step 6: Final answer
    x = 17,275.83

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.