Home / 5,231.87-7,220.91-3,136.31

Finding the Fourth Proportional to 5,231.87, 7,220.91 and 3,136.31

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Solution

The fourth proportional to 5,231.87, 7,220.91 and 3,136.31 is: 4,328.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,231.87 : 7,220.91 = 3,136.31 : x
  2. Step 2: Convert to fraction form
    5,231.87/7,220.91 = 3,136.31/x
  3. Step 3: Cross multiply
    5,231.87x = 7,220.91 × 3,136.31
  4. Step 4: Simplify right side
    5,231.87x = 22,646,976.14
  5. Step 5: Solve for x
    x = 22,646,976.14/5,231.87
  6. Step 6: Final answer
    x = 4,328.66

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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.