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Finding the Fourth Proportional to 11,019, 16,502.58 and 8,427

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Solution

The fourth proportional to 11,019, 16,502.58 and 8,427 is: 12,620.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,019 : 16,502.58 = 8,427 : x
  2. Step 2: Convert to fraction form
    11,019/16,502.58 = 8,427/x
  3. Step 3: Cross multiply
    11,019x = 16,502.58 × 8,427
  4. Step 4: Simplify right side
    11,019x = 139,067,241.66
  5. Step 5: Solve for x
    x = 139,067,241.66/11,019
  6. Step 6: Final answer
    x = 12,620.68

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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.