Home / 13,581.18-20,371.68-3,720.42

Finding the Fourth Proportional to 13,581.18, 20,371.68 and 3,720.42

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Solution

The fourth proportional to 13,581.18, 20,371.68 and 3,720.42 is: 5,580.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.18 : 20,371.68 = 3,720.42 : x
  2. Step 2: Convert to fraction form
    13,581.18/20,371.68 = 3,720.42/x
  3. Step 3: Cross multiply
    13,581.18x = 20,371.68 × 3,720.42
  4. Step 4: Simplify right side
    13,581.18x = 75,791,205.71
  5. Step 5: Solve for x
    x = 75,791,205.71/13,581.18
  6. Step 6: Final answer
    x = 5,580.61

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1.5x scale

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.