Home / 20,764.53-31,147.28-7,438.44

Finding the Fourth Proportional to 20,764.53, 31,147.28 and 7,438.44

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Solution

The fourth proportional to 20,764.53, 31,147.28 and 7,438.44 is: 11,157.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.53 : 31,147.28 = 7,438.44 : x
  2. Step 2: Convert to fraction form
    20,764.53/31,147.28 = 7,438.44/x
  3. Step 3: Cross multiply
    20,764.53x = 31,147.28 × 7,438.44
  4. Step 4: Simplify right side
    20,764.53x = 231,687,136.25
  5. Step 5: Solve for x
    x = 231,687,136.25/20,764.53
  6. Step 6: Final answer
    x = 11,157.83

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1.5x scale

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.