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Finding the Fourth Proportional to 18,820.41, 28,234.92 and 6,340.11

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Solution

The fourth proportional to 18,820.41, 28,234.92 and 6,340.11 is: 9,511.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.41 : 28,234.92 = 6,340.11 : x
  2. Step 2: Convert to fraction form
    18,820.41/28,234.92 = 6,340.11/x
  3. Step 3: Cross multiply
    18,820.41x = 28,234.92 × 6,340.11
  4. Step 4: Simplify right side
    18,820.41x = 179,012,498.64
  5. Step 5: Solve for x
    x = 179,012,498.64/18,820.41
  6. Step 6: Final answer
    x = 9,511.62

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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.