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Finding the Fourth Proportional to 19,863.68, 29,795.04 and 8,168.72

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Solution

The fourth proportional to 19,863.68, 29,795.04 and 8,168.72 is: 12,252.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,863.68 : 29,795.04 = 8,168.72 : x
  2. Step 2: Convert to fraction form
    19,863.68/29,795.04 = 8,168.72/x
  3. Step 3: Cross multiply
    19,863.68x = 29,795.04 × 8,168.72
  4. Step 4: Simplify right side
    19,863.68x = 243,387,339.15
  5. Step 5: Solve for x
    x = 243,387,339.15/19,863.68
  6. Step 6: Final answer
    x = 12,252.88

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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.