Home / 20,863.36-28,793.86-11,912.16

Finding the Fourth Proportional to 20,863.36, 28,793.86 and 11,912.16

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Solution

The fourth proportional to 20,863.36, 28,793.86 and 11,912.16 is: 16,440.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.36 : 28,793.86 = 11,912.16 : x
  2. Step 2: Convert to fraction form
    20,863.36/28,793.86 = 11,912.16/x
  3. Step 3: Cross multiply
    20,863.36x = 28,793.86 × 11,912.16
  4. Step 4: Simplify right side
    20,863.36x = 342,997,067.34
  5. Step 5: Solve for x
    x = 342,997,067.34/20,863.36
  6. Step 6: Final answer
    x = 16,440.16

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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.