Home / 5,131.80-7,704.90-3,187.80

Finding the Fourth Proportional to 5,131.80, 7,704.90 and 3,187.80

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Solution

The fourth proportional to 5,131.80, 7,704.90 and 3,187.80 is: 4,786.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,131.80 : 7,704.90 = 3,187.80 : x
  2. Step 2: Convert to fraction form
    5,131.80/7,704.90 = 3,187.80/x
  3. Step 3: Cross multiply
    5,131.80x = 7,704.90 × 3,187.80
  4. Step 4: Simplify right side
    5,131.80x = 24,561,680.22
  5. Step 5: Solve for x
    x = 24,561,680.22/5,131.80
  6. Step 6: Final answer
    x = 4,786.17

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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.