Home / 3,721.76-5,580.40-1,991.84

Finding the Fourth Proportional to 3,721.76, 5,580.40 and 1,991.84

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Solution

The fourth proportional to 3,721.76, 5,580.40 and 1,991.84 is: 2,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.76 : 5,580.40 = 1,991.84 : x
  2. Step 2: Convert to fraction form
    3,721.76/5,580.40 = 1,991.84/x
  3. Step 3: Cross multiply
    3,721.76x = 5,580.40 × 1,991.84
  4. Step 4: Simplify right side
    3,721.76x = 11,115,263.94
  5. Step 5: Solve for x
    x = 11,115,263.94/3,721.76
  6. Step 6: Final answer
    x = 2,986.56

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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.