Home / 13,581.68-20,375.41-4,221.47

Finding the Fourth Proportional to 13,581.68, 20,375.41 and 4,221.47

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Solution

The fourth proportional to 13,581.68, 20,375.41 and 4,221.47 is: 6,333.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.68 : 20,375.41 = 4,221.47 : x
  2. Step 2: Convert to fraction form
    13,581.68/20,375.41 = 4,221.47/x
  3. Step 3: Cross multiply
    13,581.68x = 20,375.41 × 4,221.47
  4. Step 4: Simplify right side
    13,581.68x = 86,014,230.35
  5. Step 5: Solve for x
    x = 86,014,230.35/13,581.68
  6. Step 6: Final answer
    x = 6,333.11

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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.