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Finding the Fourth Proportional to 13,919.60, 20,877.96 and 13,107.44

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Solution

The fourth proportional to 13,919.60, 20,877.96 and 13,107.44 is: 19,659.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.60 : 20,877.96 = 13,107.44 : x
  2. Step 2: Convert to fraction form
    13,919.60/20,877.96 = 13,107.44/x
  3. Step 3: Cross multiply
    13,919.60x = 20,877.96 × 13,107.44
  4. Step 4: Simplify right side
    13,919.60x = 273,656,608.02
  5. Step 5: Solve for x
    x = 273,656,608.02/13,919.60
  6. Step 6: Final answer
    x = 19,659.80

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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.