Home / 13,581.45-20,372.19-3,720.81

Finding the Fourth Proportional to 13,581.45, 20,372.19 and 3,720.81

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Solution

The fourth proportional to 13,581.45, 20,372.19 and 3,720.81 is: 5,581.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.45 : 20,372.19 = 3,720.81 : x
  2. Step 2: Convert to fraction form
    13,581.45/20,372.19 = 3,720.81/x
  3. Step 3: Cross multiply
    13,581.45x = 20,372.19 × 3,720.81
  4. Step 4: Simplify right side
    13,581.45x = 75,801,048.27
  5. Step 5: Solve for x
    x = 75,801,048.27/13,581.45
  6. Step 6: Final answer
    x = 5,581.22

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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.