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Finding the Fourth Proportional to 18,819.09, 28,230.53 and 4,968.09

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Solution

The fourth proportional to 18,819.09, 28,230.53 and 4,968.09 is: 7,452.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.09 : 28,230.53 = 4,968.09 : x
  2. Step 2: Convert to fraction form
    18,819.09/28,230.53 = 4,968.09/x
  3. Step 3: Cross multiply
    18,819.09x = 28,230.53 × 4,968.09
  4. Step 4: Simplify right side
    18,819.09x = 140,251,813.79
  5. Step 5: Solve for x
    x = 140,251,813.79/18,819.09
  6. Step 6: Final answer
    x = 7,452.64

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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.