Home / 13,909.15-20,863.81-3,520.90

Finding the Fourth Proportional to 13,909.15, 20,863.81 and 3,520.90

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Solution

The fourth proportional to 13,909.15, 20,863.81 and 3,520.90 is: 5,281.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.15 : 20,863.81 = 3,520.90 : x
  2. Step 2: Convert to fraction form
    13,909.15/20,863.81 = 3,520.90/x
  3. Step 3: Cross multiply
    13,909.15x = 20,863.81 × 3,520.90
  4. Step 4: Simplify right side
    13,909.15x = 73,459,340.87
  5. Step 5: Solve for x
    x = 73,459,340.87/13,909.15
  6. Step 6: Final answer
    x = 5,281.37

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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.