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Finding the Fourth Proportional to 13,451, 20,179.74 and 4,217

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Solution

The fourth proportional to 13,451, 20,179.74 and 4,217 is: 6,326.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,451 : 20,179.74 = 4,217 : x
  2. Step 2: Convert to fraction form
    13,451/20,179.74 = 4,217/x
  3. Step 3: Cross multiply
    13,451x = 20,179.74 × 4,217
  4. Step 4: Simplify right side
    13,451x = 85,097,963.58
  5. Step 5: Solve for x
    x = 85,097,963.58/13,451
  6. Step 6: Final answer
    x = 6,326.52

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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.