Home / 10,781.06-16,172.26-3,385.80

Finding the Fourth Proportional to 10,781.06, 16,172.26 and 3,385.80

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Solution

The fourth proportional to 10,781.06, 16,172.26 and 3,385.80 is: 5,078.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,781.06 : 16,172.26 = 3,385.80 : x
  2. Step 2: Convert to fraction form
    10,781.06/16,172.26 = 3,385.80/x
  3. Step 3: Cross multiply
    10,781.06x = 16,172.26 × 3,385.80
  4. Step 4: Simplify right side
    10,781.06x = 54,756,029.44
  5. Step 5: Solve for x
    x = 54,756,029.44/10,781.06
  6. Step 6: Final answer
    x = 5,078.91

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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.