Home / 20,638.22-28,481.70-11,684.54

Finding the Fourth Proportional to 20,638.22, 28,481.70 and 11,684.54

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Solution

The fourth proportional to 20,638.22, 28,481.70 and 11,684.54 is: 16,125.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.22 : 28,481.70 = 11,684.54 : x
  2. Step 2: Convert to fraction form
    20,638.22/28,481.70 = 11,684.54/x
  3. Step 3: Cross multiply
    20,638.22x = 28,481.70 × 11,684.54
  4. Step 4: Simplify right side
    20,638.22x = 332,795,562.92
  5. Step 5: Solve for x
    x = 332,795,562.92/20,638.22
  6. Step 6: Final answer
    x = 16,125.21

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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.