Home / 11,980.20-17,961.80-4,578.42

Finding the Fourth Proportional to 11,980.20, 17,961.80 and 4,578.42

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Solution

The fourth proportional to 11,980.20, 17,961.80 and 4,578.42 is: 6,864.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,980.20 : 17,961.80 = 4,578.42 : x
  2. Step 2: Convert to fraction form
    11,980.20/17,961.80 = 4,578.42/x
  3. Step 3: Cross multiply
    11,980.20x = 17,961.80 × 4,578.42
  4. Step 4: Simplify right side
    11,980.20x = 82,236,734.57
  5. Step 5: Solve for x
    x = 82,236,734.57/11,980.20
  6. Step 6: Final answer
    x = 6,864.39

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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.