Home / 20,912.72-28,859.58-11,481.32

Finding the Fourth Proportional to 20,912.72, 28,859.58 and 11,481.32

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Solution

The fourth proportional to 20,912.72, 28,859.58 and 11,481.32 is: 15,844.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.72 : 28,859.58 = 11,481.32 : x
  2. Step 2: Convert to fraction form
    20,912.72/28,859.58 = 11,481.32/x
  3. Step 3: Cross multiply
    20,912.72x = 28,859.58 × 11,481.32
  4. Step 4: Simplify right side
    20,912.72x = 331,346,073.05
  5. Step 5: Solve for x
    x = 331,346,073.05/20,912.72
  6. Step 6: Final answer
    x = 15,844.24

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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.