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Finding the Fourth Proportional to 8,390.52, 12,579.57 and 4,227.48

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Solution

The fourth proportional to 8,390.52, 12,579.57 and 4,227.48 is: 6,338.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.52 : 12,579.57 = 4,227.48 : x
  2. Step 2: Convert to fraction form
    8,390.52/12,579.57 = 4,227.48/x
  3. Step 3: Cross multiply
    8,390.52x = 12,579.57 × 4,227.48
  4. Step 4: Simplify right side
    8,390.52x = 53,179,880.58
  5. Step 5: Solve for x
    x = 53,179,880.58/8,390.52
  6. Step 6: Final answer
    x = 6,338.09

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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.