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Finding the Fourth Proportional to 8,421.99, 12,636.23 and 3,226.65

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Solution

The fourth proportional to 8,421.99, 12,636.23 and 3,226.65 is: 4,841.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.99 : 12,636.23 = 3,226.65 : x
  2. Step 2: Convert to fraction form
    8,421.99/12,636.23 = 3,226.65/x
  3. Step 3: Cross multiply
    8,421.99x = 12,636.23 × 3,226.65
  4. Step 4: Simplify right side
    8,421.99x = 40,772,691.53
  5. Step 5: Solve for x
    x = 40,772,691.53/8,421.99
  6. Step 6: Final answer
    x = 4,841.22

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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.