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Finding the Fourth Proportional to 20,791.97, 28,694.09 and 12,834.32

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Solution

The fourth proportional to 20,791.97, 28,694.09 and 12,834.32 is: 17,712.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,791.97 : 28,694.09 = 12,834.32 : x
  2. Step 2: Convert to fraction form
    20,791.97/28,694.09 = 12,834.32/x
  3. Step 3: Cross multiply
    20,791.97x = 28,694.09 × 12,834.32
  4. Step 4: Simplify right side
    20,791.97x = 368,269,236.99
  5. Step 5: Solve for x
    x = 368,269,236.99/20,791.97
  6. Step 6: Final answer
    x = 17,712.09

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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.