Home / 11,412.72-17,121.60-3,515.28

Finding the Fourth Proportional to 11,412.72, 17,121.60 and 3,515.28

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Solution

The fourth proportional to 11,412.72, 17,121.60 and 3,515.28 is: 5,273.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,412.72 : 17,121.60 = 3,515.28 : x
  2. Step 2: Convert to fraction form
    11,412.72/17,121.60 = 3,515.28/x
  3. Step 3: Cross multiply
    11,412.72x = 17,121.60 × 3,515.28
  4. Step 4: Simplify right side
    11,412.72x = 60,187,218.05
  5. Step 5: Solve for x
    x = 60,187,218.05/11,412.72
  6. Step 6: Final answer
    x = 5,273.70

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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.