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Finding the Fourth Proportional to 19,481.64, 29,216.92 and 8,385.88

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Solution

The fourth proportional to 19,481.64, 29,216.92 and 8,385.88 is: 12,576.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,481.64 : 29,216.92 = 8,385.88 : x
  2. Step 2: Convert to fraction form
    19,481.64/29,216.92 = 8,385.88/x
  3. Step 3: Cross multiply
    19,481.64x = 29,216.92 × 8,385.88
  4. Step 4: Simplify right side
    19,481.64x = 245,009,585.09
  5. Step 5: Solve for x
    x = 245,009,585.09/19,481.64
  6. Step 6: Final answer
    x = 12,576.44

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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.