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Finding the Fourth Proportional to 18,819.76, 28,229.67 and 5,675.89

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Solution

The fourth proportional to 18,819.76, 28,229.67 and 5,675.89 is: 8,513.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.76 : 28,229.67 = 5,675.89 : x
  2. Step 2: Convert to fraction form
    18,819.76/28,229.67 = 5,675.89/x
  3. Step 3: Cross multiply
    18,819.76x = 28,229.67 × 5,675.89
  4. Step 4: Simplify right side
    18,819.76x = 160,228,501.66
  5. Step 5: Solve for x
    x = 160,228,501.66/18,819.76
  6. Step 6: Final answer
    x = 8,513.84

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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.