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Finding the Fourth Proportional to 11,121, 16,682.58 and 2,913

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Solution

The fourth proportional to 11,121, 16,682.58 and 2,913 is: 4,369.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121 : 16,682.58 = 2,913 : x
  2. Step 2: Convert to fraction form
    11,121/16,682.58 = 2,913/x
  3. Step 3: Cross multiply
    11,121x = 16,682.58 × 2,913
  4. Step 4: Simplify right side
    11,121x = 48,596,355.54
  5. Step 5: Solve for x
    x = 48,596,355.54/11,121
  6. Step 6: Final answer
    x = 4,369.78

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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.