Home / 13,909.22-20,863.87-3,520.96

Finding the Fourth Proportional to 13,909.22, 20,863.87 and 3,520.96

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Solution

The fourth proportional to 13,909.22, 20,863.87 and 3,520.96 is: 5,281.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.22 : 20,863.87 = 3,520.96 : x
  2. Step 2: Convert to fraction form
    13,909.22/20,863.87 = 3,520.96/x
  3. Step 3: Cross multiply
    13,909.22x = 20,863.87 × 3,520.96
  4. Step 4: Simplify right side
    13,909.22x = 73,460,851.72
  5. Step 5: Solve for x
    x = 73,460,851.72/13,909.22
  6. Step 6: Final answer
    x = 5,281.45

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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.