Home / 20,352.24-28,086.45-11,399.70

Finding the Fourth Proportional to 20,352.24, 28,086.45 and 11,399.70

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Solution

The fourth proportional to 20,352.24, 28,086.45 and 11,399.70 is: 15,731.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,352.24 : 28,086.45 = 11,399.70 : x
  2. Step 2: Convert to fraction form
    20,352.24/28,086.45 = 11,399.70/x
  3. Step 3: Cross multiply
    20,352.24x = 28,086.45 × 11,399.70
  4. Step 4: Simplify right side
    20,352.24x = 320,177,104.07
  5. Step 5: Solve for x
    x = 320,177,104.07/20,352.24
  6. Step 6: Final answer
    x = 15,731.79

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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.