Home / 11,918.42-17,877.78-8,219.66

Finding the Fourth Proportional to 11,918.42, 17,877.78 and 8,219.66

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Solution

The fourth proportional to 11,918.42, 17,877.78 and 8,219.66 is: 12,329.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.42 : 17,877.78 = 8,219.66 : x
  2. Step 2: Convert to fraction form
    11,918.42/17,877.78 = 8,219.66/x
  3. Step 3: Cross multiply
    11,918.42x = 17,877.78 × 8,219.66
  4. Step 4: Simplify right side
    11,918.42x = 146,949,183.77
  5. Step 5: Solve for x
    x = 146,949,183.77/11,918.42
  6. Step 6: Final answer
    x = 12,329.59

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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.