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Finding the Fourth Proportional to 57,720.78, 86,589.83 and 20,274.25

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Solution

The fourth proportional to 57,720.78, 86,589.83 and 20,274.25 is: 30,414.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,720.78 : 86,589.83 = 20,274.25 : x
  2. Step 2: Convert to fraction form
    57,720.78/86,589.83 = 20,274.25/x
  3. Step 3: Cross multiply
    57,720.78x = 86,589.83 × 20,274.25
  4. Step 4: Simplify right side
    57,720.78x = 1,755,543,860.88
  5. Step 5: Solve for x
    x = 1,755,543,860.88/57,720.78
  6. Step 6: Final answer
    x = 30,414.42

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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.