Home / 13,581.22-20,365.68-4,218.46

Finding the Fourth Proportional to 13,581.22, 20,365.68 and 4,218.46

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Solution

The fourth proportional to 13,581.22, 20,365.68 and 4,218.46 is: 6,325.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.22 : 20,365.68 = 4,218.46 : x
  2. Step 2: Convert to fraction form
    13,581.22/20,365.68 = 4,218.46/x
  3. Step 3: Cross multiply
    13,581.22x = 20,365.68 × 4,218.46
  4. Step 4: Simplify right side
    13,581.22x = 85,911,806.45
  5. Step 5: Solve for x
    x = 85,911,806.45/13,581.22
  6. Step 6: Final answer
    x = 6,325.78

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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.