Home / 20,860.94-28,790.84-11,906.39

Finding the Fourth Proportional to 20,860.94, 28,790.84 and 11,906.39

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Solution

The fourth proportional to 20,860.94, 28,790.84 and 11,906.39 is: 16,432.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.94 : 28,790.84 = 11,906.39 : x
  2. Step 2: Convert to fraction form
    20,860.94/28,790.84 = 11,906.39/x
  3. Step 3: Cross multiply
    20,860.94x = 28,790.84 × 11,906.39
  4. Step 4: Simplify right side
    20,860.94x = 342,794,969.47
  5. Step 5: Solve for x
    x = 342,794,969.47/20,860.94
  6. Step 6: Final answer
    x = 16,432.38

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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.