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Finding the Fourth Proportional to 27,216.20, 40,824.30 and 20,217.80

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Solution

The fourth proportional to 27,216.20, 40,824.30 and 20,217.80 is: 30,326.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,216.20 : 40,824.30 = 20,217.80 : x
  2. Step 2: Convert to fraction form
    27,216.20/40,824.30 = 20,217.80/x
  3. Step 3: Cross multiply
    27,216.20x = 40,824.30 × 20,217.80
  4. Step 4: Simplify right side
    27,216.20x = 825,377,532.54
  5. Step 5: Solve for x
    x = 825,377,532.54/27,216.20
  6. Step 6: Final answer
    x = 30,326.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.