Home / 20,419.76-28,182.32-12,466.61

Finding the Fourth Proportional to 20,419.76, 28,182.32 and 12,466.61

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Solution

The fourth proportional to 20,419.76, 28,182.32 and 12,466.61 is: 17,205.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.76 : 28,182.32 = 12,466.61 : x
  2. Step 2: Convert to fraction form
    20,419.76/28,182.32 = 12,466.61/x
  3. Step 3: Cross multiply
    20,419.76x = 28,182.32 × 12,466.61
  4. Step 4: Simplify right side
    20,419.76x = 351,337,789.09
  5. Step 5: Solve for x
    x = 351,337,789.09/20,419.76
  6. Step 6: Final answer
    x = 17,205.78

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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.