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Finding the Fourth Proportional to 27,884.60, 38,480.81 and 15,137.80

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Solution

The fourth proportional to 27,884.60, 38,480.81 and 15,137.80 is: 20,890.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,884.60 : 38,480.81 = 15,137.80 : x
  2. Step 2: Convert to fraction form
    27,884.60/38,480.81 = 15,137.80/x
  3. Step 3: Cross multiply
    27,884.60x = 38,480.81 × 15,137.80
  4. Step 4: Simplify right side
    27,884.60x = 582,514,633.73
  5. Step 5: Solve for x
    x = 582,514,633.73/27,884.60
  6. Step 6: Final answer
    x = 20,890.20

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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.