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Finding the Fourth Proportional to 18,665.40, 28,002.25 and 6,819.15

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Solution

The fourth proportional to 18,665.40, 28,002.25 and 6,819.15 is: 10,230.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,665.40 : 28,002.25 = 6,819.15 : x
  2. Step 2: Convert to fraction form
    18,665.40/28,002.25 = 6,819.15/x
  3. Step 3: Cross multiply
    18,665.40x = 28,002.25 × 6,819.15
  4. Step 4: Simplify right side
    18,665.40x = 190,951,656.62
  5. Step 5: Solve for x
    x = 190,951,656.62/18,665.40
  6. Step 6: Final answer
    x = 10,230.25

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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.