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Finding the Fourth Proportional to 12,281.10, 18,418 and 4,488.09

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Solution

The fourth proportional to 12,281.10, 18,418 and 4,488.09 is: 6,730.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.10 : 18,418 = 4,488.09 : x
  2. Step 2: Convert to fraction form
    12,281.10/18,418 = 4,488.09/x
  3. Step 3: Cross multiply
    12,281.10x = 18,418 × 4,488.09
  4. Step 4: Simplify right side
    12,281.10x = 82,661,641.62
  5. Step 5: Solve for x
    x = 82,661,641.62/12,281.10
  6. Step 6: Final answer
    x = 6,730.80

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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.