Home / 20,946.75-28,906.72-11,515.52

Finding the Fourth Proportional to 20,946.75, 28,906.72 and 11,515.52

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Solution

The fourth proportional to 20,946.75, 28,906.72 and 11,515.52 is: 15,891.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.75 : 28,906.72 = 11,515.52 : x
  2. Step 2: Convert to fraction form
    20,946.75/28,906.72 = 11,515.52/x
  3. Step 3: Cross multiply
    20,946.75x = 28,906.72 × 11,515.52
  4. Step 4: Simplify right side
    20,946.75x = 332,875,738.97
  5. Step 5: Solve for x
    x = 332,875,738.97/20,946.75
  6. Step 6: Final answer
    x = 15,891.52

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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.