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Finding the Fourth Proportional to 27,694.80, 38,161.80 and 21,387.60

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Solution

The fourth proportional to 27,694.80, 38,161.80 and 21,387.60 is: 29,470.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,694.80 : 38,161.80 = 21,387.60 : x
  2. Step 2: Convert to fraction form
    27,694.80/38,161.80 = 21,387.60/x
  3. Step 3: Cross multiply
    27,694.80x = 38,161.80 × 21,387.60
  4. Step 4: Simplify right side
    27,694.80x = 816,189,313.68
  5. Step 5: Solve for x
    x = 816,189,313.68/27,694.80
  6. Step 6: Final answer
    x = 29,470.85

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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.