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Finding the Fourth Proportional to 11,868, 16,379.28 and 6,900

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Solution

The fourth proportional to 11,868, 16,379.28 and 6,900 is: 9,522.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,868 : 16,379.28 = 6,900 : x
  2. Step 2: Convert to fraction form
    11,868/16,379.28 = 6,900/x
  3. Step 3: Cross multiply
    11,868x = 16,379.28 × 6,900
  4. Step 4: Simplify right side
    11,868x = 113,017,032
  5. Step 5: Solve for x
    x = 113,017,032/11,868
  6. Step 6: Final answer
    x = 9,522.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.