Home / 20,399.36-28,151.56-11,447.52

Finding the Fourth Proportional to 20,399.36, 28,151.56 and 11,447.52

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Solution

The fourth proportional to 20,399.36, 28,151.56 and 11,447.52 is: 15,797.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.36 : 28,151.56 = 11,447.52 : x
  2. Step 2: Convert to fraction form
    20,399.36/28,151.56 = 11,447.52/x
  3. Step 3: Cross multiply
    20,399.36x = 28,151.56 × 11,447.52
  4. Step 4: Simplify right side
    20,399.36x = 322,265,546.13
  5. Step 5: Solve for x
    x = 322,265,546.13/20,399.36
  6. Step 6: Final answer
    x = 15,797.83

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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.