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Finding the Fourth Proportional to 18,131.80, 27,197.70 and 15,944.80

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Solution

The fourth proportional to 18,131.80, 27,197.70 and 15,944.80 is: 23,917.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,131.80 : 27,197.70 = 15,944.80 : x
  2. Step 2: Convert to fraction form
    18,131.80/27,197.70 = 15,944.80/x
  3. Step 3: Cross multiply
    18,131.80x = 27,197.70 × 15,944.80
  4. Step 4: Simplify right side
    18,131.80x = 433,661,886.96
  5. Step 5: Solve for x
    x = 433,661,886.96/18,131.80
  6. Step 6: Final answer
    x = 23,917.20

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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.