Home / 13,949.20-20,917.20-8,107.60

Finding the Fourth Proportional to 13,949.20, 20,917.20 and 8,107.60

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Solution

The fourth proportional to 13,949.20, 20,917.20 and 8,107.60 is: 12,157.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,949.20 : 20,917.20 = 8,107.60 : x
  2. Step 2: Convert to fraction form
    13,949.20/20,917.20 = 8,107.60/x
  3. Step 3: Cross multiply
    13,949.20x = 20,917.20 × 8,107.60
  4. Step 4: Simplify right side
    13,949.20x = 169,588,290.72
  5. Step 5: Solve for x
    x = 169,588,290.72/13,949.20
  6. Step 6: Final answer
    x = 12,157.56

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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.