Home / 3,729.80-5,147.78-2,136.53

Finding the Fourth Proportional to 3,729.80, 5,147.78 and 2,136.53

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Solution

The fourth proportional to 3,729.80, 5,147.78 and 2,136.53 is: 2,948.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,729.80 : 5,147.78 = 2,136.53 : x
  2. Step 2: Convert to fraction form
    3,729.80/5,147.78 = 2,136.53/x
  3. Step 3: Cross multiply
    3,729.80x = 5,147.78 × 2,136.53
  4. Step 4: Simplify right side
    3,729.80x = 10,998,349.98
  5. Step 5: Solve for x
    x = 10,998,349.98/3,729.80
  6. Step 6: Final answer
    x = 2,948.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.