Home / 3,817.80-5,727.87-2,085.21

Finding the Fourth Proportional to 3,817.80, 5,727.87 and 2,085.21

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Solution

The fourth proportional to 3,817.80, 5,727.87 and 2,085.21 is: 3,128.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,817.80 : 5,727.87 = 2,085.21 : x
  2. Step 2: Convert to fraction form
    3,817.80/5,727.87 = 2,085.21/x
  3. Step 3: Cross multiply
    3,817.80x = 5,727.87 × 2,085.21
  4. Step 4: Simplify right side
    3,817.80x = 11,943,811.80
  5. Step 5: Solve for x
    x = 11,943,811.80/3,817.80
  6. Step 6: Final answer
    x = 3,128.45

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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.