Home / 7,136.31-9,847.70-3,949.42

Finding the Fourth Proportional to 7,136.31, 9,847.70 and 3,949.42

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Solution

The fourth proportional to 7,136.31, 9,847.70 and 3,949.42 is: 5,449.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,136.31 : 9,847.70 = 3,949.42 : x
  2. Step 2: Convert to fraction form
    7,136.31/9,847.70 = 3,949.42/x
  3. Step 3: Cross multiply
    7,136.31x = 9,847.70 × 3,949.42
  4. Step 4: Simplify right side
    7,136.31x = 38,892,658.97
  5. Step 5: Solve for x
    x = 38,892,658.97/7,136.31
  6. Step 6: Final answer
    x = 5,449.97

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1.5x scale

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.