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Finding the Fourth Proportional to 18,819.09, 28,228.65 and 5,675.22

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Solution

The fourth proportional to 18,819.09, 28,228.65 and 5,675.22 is: 8,512.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.09 : 28,228.65 = 5,675.22 : x
  2. Step 2: Convert to fraction form
    18,819.09/28,228.65 = 5,675.22/x
  3. Step 3: Cross multiply
    18,819.09x = 28,228.65 × 5,675.22
  4. Step 4: Simplify right side
    18,819.09x = 160,203,799.05
  5. Step 5: Solve for x
    x = 160,203,799.05/18,819.09
  6. Step 6: Final answer
    x = 8,512.83

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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.