Home / 13,581.15-20,369.28-3,719.59

Finding the Fourth Proportional to 13,581.15, 20,369.28 and 3,719.59

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Solution

The fourth proportional to 13,581.15, 20,369.28 and 3,719.59 is: 5,578.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.15 : 20,369.28 = 3,719.59 : x
  2. Step 2: Convert to fraction form
    13,581.15/20,369.28 = 3,719.59/x
  3. Step 3: Cross multiply
    13,581.15x = 20,369.28 × 3,719.59
  4. Step 4: Simplify right side
    13,581.15x = 75,765,370.20
  5. Step 5: Solve for x
    x = 75,765,370.20/13,581.15
  6. Step 6: Final answer
    x = 5,578.72

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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.