Home / 20,772.58-28,662.30-11,819.55

Finding the Fourth Proportional to 20,772.58, 28,662.30 and 11,819.55

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Solution

The fourth proportional to 20,772.58, 28,662.30 and 11,819.55 is: 16,308.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.58 : 28,662.30 = 11,819.55 : x
  2. Step 2: Convert to fraction form
    20,772.58/28,662.30 = 11,819.55/x
  3. Step 3: Cross multiply
    20,772.58x = 28,662.30 × 11,819.55
  4. Step 4: Simplify right side
    20,772.58x = 338,775,487.97
  5. Step 5: Solve for x
    x = 338,775,487.97/20,772.58
  6. Step 6: Final answer
    x = 16,308.78

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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.