Home / 57,854.30-86,789.21-20,405.57

Finding the Fourth Proportional to 57,854.30, 86,789.21 and 20,405.57

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Solution

The fourth proportional to 57,854.30, 86,789.21 and 20,405.57 is: 30,611.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,854.30 : 86,789.21 = 20,405.57 : x
  2. Step 2: Convert to fraction form
    57,854.30/86,789.21 = 20,405.57/x
  3. Step 3: Cross multiply
    57,854.30x = 86,789.21 × 20,405.57
  4. Step 4: Simplify right side
    57,854.30x = 1,770,982,763.93
  5. Step 5: Solve for x
    x = 1,770,982,763.93/57,854.30
  6. Step 6: Final answer
    x = 30,611.09

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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.