Home / 20,399.11-28,151.28-11,447.33

Finding the Fourth Proportional to 20,399.11, 28,151.28 and 11,447.33

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Solution

The fourth proportional to 20,399.11, 28,151.28 and 11,447.33 is: 15,797.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.11 : 28,151.28 = 11,447.33 : x
  2. Step 2: Convert to fraction form
    20,399.11/28,151.28 = 11,447.33/x
  3. Step 3: Cross multiply
    20,399.11x = 28,151.28 × 11,447.33
  4. Step 4: Simplify right side
    20,399.11x = 322,256,851.33
  5. Step 5: Solve for x
    x = 322,256,851.33/20,399.11
  6. Step 6: Final answer
    x = 15,797.60

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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.