Home / 20,858.07-28,786.19-11,906.91

Finding the Fourth Proportional to 20,858.07, 28,786.19 and 11,906.91

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Solution

The fourth proportional to 20,858.07, 28,786.19 and 11,906.91 is: 16,432.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.07 : 28,786.19 = 11,906.91 : x
  2. Step 2: Convert to fraction form
    20,858.07/28,786.19 = 11,906.91/x
  3. Step 3: Cross multiply
    20,858.07x = 28,786.19 × 11,906.91
  4. Step 4: Simplify right side
    20,858.07x = 342,754,573.57
  5. Step 5: Solve for x
    x = 342,754,573.57/20,858.07
  6. Step 6: Final answer
    x = 16,432.71

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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.