Home / 20,951.28-28,912.32-11,519.64

Finding the Fourth Proportional to 20,951.28, 28,912.32 and 11,519.64

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Solution

The fourth proportional to 20,951.28, 28,912.32 and 11,519.64 is: 15,896.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.28 : 28,912.32 = 11,519.64 : x
  2. Step 2: Convert to fraction form
    20,951.28/28,912.32 = 11,519.64/x
  3. Step 3: Cross multiply
    20,951.28x = 28,912.32 × 11,519.64
  4. Step 4: Simplify right side
    20,951.28x = 333,059,517.96
  5. Step 5: Solve for x
    x = 333,059,517.96/20,951.28
  6. Step 6: Final answer
    x = 15,896.86

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1.5x scale

Why These Related Problems?

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