Home / 20,399.22-28,150.66-11,446.90

Finding the Fourth Proportional to 20,399.22, 28,150.66 and 11,446.90

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Solution

The fourth proportional to 20,399.22, 28,150.66 and 11,446.90 is: 15,796.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.22 : 28,150.66 = 11,446.90 : x
  2. Step 2: Convert to fraction form
    20,399.22/28,150.66 = 11,446.90/x
  3. Step 3: Cross multiply
    20,399.22x = 28,150.66 × 11,446.90
  4. Step 4: Simplify right side
    20,399.22x = 322,237,789.95
  5. Step 5: Solve for x
    x = 322,237,789.95/20,399.22
  6. Step 6: Final answer
    x = 15,796.57

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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.