Home / 20,138.26-30,188.76-7,654.54

Finding the Fourth Proportional to 20,138.26, 30,188.76 and 7,654.54

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Solution

The fourth proportional to 20,138.26, 30,188.76 and 7,654.54 is: 11,474.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.26 : 30,188.76 = 7,654.54 : x
  2. Step 2: Convert to fraction form
    20,138.26/30,188.76 = 7,654.54/x
  3. Step 3: Cross multiply
    20,138.26x = 30,188.76 × 7,654.54
  4. Step 4: Simplify right side
    20,138.26x = 231,081,070.97
  5. Step 5: Solve for x
    x = 231,081,070.97/20,138.26
  6. Step 6: Final answer
    x = 11,474.73

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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.