Home / 20,946.60-28,906.41-11,515.77

Finding the Fourth Proportional to 20,946.60, 28,906.41 and 11,515.77

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Solution

The fourth proportional to 20,946.60, 28,906.41 and 11,515.77 is: 15,891.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.60 : 28,906.41 = 11,515.77 : x
  2. Step 2: Convert to fraction form
    20,946.60/28,906.41 = 11,515.77/x
  3. Step 3: Cross multiply
    20,946.60x = 28,906.41 × 11,515.77
  4. Step 4: Simplify right side
    20,946.60x = 332,879,569.09
  5. Step 5: Solve for x
    x = 332,879,569.09/20,946.60
  6. Step 6: Final answer
    x = 15,891.82

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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.