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Finding the Fourth Proportional to 18,731.78, 25,847.25 and 18,227.78

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Solution

The fourth proportional to 18,731.78, 25,847.25 and 18,227.78 is: 25,151.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.78 : 25,847.25 = 18,227.78 : x
  2. Step 2: Convert to fraction form
    18,731.78/25,847.25 = 18,227.78/x
  3. Step 3: Cross multiply
    18,731.78x = 25,847.25 × 18,227.78
  4. Step 4: Simplify right side
    18,731.78x = 471,137,982.87
  5. Step 5: Solve for x
    x = 471,137,982.87/18,731.78
  6. Step 6: Final answer
    x = 25,151.80

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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.