Home / 20,420.76-28,183.70-12,467.61

Finding the Fourth Proportional to 20,420.76, 28,183.70 and 12,467.61

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Solution

The fourth proportional to 20,420.76, 28,183.70 and 12,467.61 is: 17,207.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.76 : 28,183.70 = 12,467.61 : x
  2. Step 2: Convert to fraction form
    20,420.76/28,183.70 = 12,467.61/x
  3. Step 3: Cross multiply
    20,420.76x = 28,183.70 × 12,467.61
  4. Step 4: Simplify right side
    20,420.76x = 351,383,379.96
  5. Step 5: Solve for x
    x = 351,383,379.96/20,420.76
  6. Step 6: Final answer
    x = 17,207.16

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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.