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Finding the Fourth Proportional to 8,578.44, 12,866.22 and 2,421

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Solution

The fourth proportional to 8,578.44, 12,866.22 and 2,421 is: 3,631.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.44 : 12,866.22 = 2,421 : x
  2. Step 2: Convert to fraction form
    8,578.44/12,866.22 = 2,421/x
  3. Step 3: Cross multiply
    8,578.44x = 12,866.22 × 2,421
  4. Step 4: Simplify right side
    8,578.44x = 31,149,118.62
  5. Step 5: Solve for x
    x = 31,149,118.62/8,578.44
  6. Step 6: Final answer
    x = 3,631.09

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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.