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Finding the Fourth Proportional to 57,704.80, 86,561.04 and 20,260.32

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Solution

The fourth proportional to 57,704.80, 86,561.04 and 20,260.32 is: 30,391.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,704.80 : 86,561.04 = 20,260.32 : x
  2. Step 2: Convert to fraction form
    57,704.80/86,561.04 = 20,260.32/x
  3. Step 3: Cross multiply
    57,704.80x = 86,561.04 × 20,260.32
  4. Step 4: Simplify right side
    57,704.80x = 1,753,754,369.93
  5. Step 5: Solve for x
    x = 1,753,754,369.93/57,704.80
  6. Step 6: Final answer
    x = 30,391.83

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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.