Home / 3,985.76-5,976.88-2,136.56

Finding the Fourth Proportional to 3,985.76, 5,976.88 and 2,136.56

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Solution

The fourth proportional to 3,985.76, 5,976.88 and 2,136.56 is: 3,203.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.76 : 5,976.88 = 2,136.56 : x
  2. Step 2: Convert to fraction form
    3,985.76/5,976.88 = 2,136.56/x
  3. Step 3: Cross multiply
    3,985.76x = 5,976.88 × 2,136.56
  4. Step 4: Simplify right side
    3,985.76x = 12,769,962.73
  5. Step 5: Solve for x
    x = 12,769,962.73/3,985.76
  6. Step 6: Final answer
    x = 3,203.90

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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.