Home / 11,939.12-17,909.81-4,919.60

Finding the Fourth Proportional to 11,939.12, 17,909.81 and 4,919.60

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Solution

The fourth proportional to 11,939.12, 17,909.81 and 4,919.60 is: 7,379.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,939.12 : 17,909.81 = 4,919.60 : x
  2. Step 2: Convert to fraction form
    11,939.12/17,909.81 = 4,919.60/x
  3. Step 3: Cross multiply
    11,939.12x = 17,909.81 × 4,919.60
  4. Step 4: Simplify right side
    11,939.12x = 88,109,121.45
  5. Step 5: Solve for x
    x = 88,109,121.45/11,939.12
  6. Step 6: Final answer
    x = 7,379.87

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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.