Home / 20,974.76-28,945.26-12,022.78

Finding the Fourth Proportional to 20,974.76, 28,945.26 and 12,022.78

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Solution

The fourth proportional to 20,974.76, 28,945.26 and 12,022.78 is: 16,591.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.76 : 28,945.26 = 12,022.78 : x
  2. Step 2: Convert to fraction form
    20,974.76/28,945.26 = 12,022.78/x
  3. Step 3: Cross multiply
    20,974.76x = 28,945.26 × 12,022.78
  4. Step 4: Simplify right side
    20,974.76x = 348,002,493.02
  5. Step 5: Solve for x
    x = 348,002,493.02/20,974.76
  6. Step 6: Final answer
    x = 16,591.49

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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.