Home / 20,946.54-28,906.30-11,515.70

Finding the Fourth Proportional to 20,946.54, 28,906.30 and 11,515.70

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Solution

The fourth proportional to 20,946.54, 28,906.30 and 11,515.70 is: 15,891.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.54 : 28,906.30 = 11,515.70 : x
  2. Step 2: Convert to fraction form
    20,946.54/28,906.30 = 11,515.70/x
  3. Step 3: Cross multiply
    20,946.54x = 28,906.30 × 11,515.70
  4. Step 4: Simplify right side
    20,946.54x = 332,876,278.91
  5. Step 5: Solve for x
    x = 332,876,278.91/20,946.54
  6. Step 6: Final answer
    x = 15,891.71

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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.