Home / 3,726.81-5,579.78-1,991.61

Finding the Fourth Proportional to 3,726.81, 5,579.78 and 1,991.61

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Solution

The fourth proportional to 3,726.81, 5,579.78 and 1,991.61 is: 2,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,726.81 : 5,579.78 = 1,991.61 : x
  2. Step 2: Convert to fraction form
    3,726.81/5,579.78 = 1,991.61/x
  3. Step 3: Cross multiply
    3,726.81x = 5,579.78 × 1,991.61
  4. Step 4: Simplify right side
    3,726.81x = 11,112,735.69
  5. Step 5: Solve for x
    x = 11,112,735.69/3,726.81
  6. Step 6: Final answer
    x = 2,981.84

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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.