Home / 13,921.60-20,880.96-13,109.44

Finding the Fourth Proportional to 13,921.60, 20,880.96 and 13,109.44

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Solution

The fourth proportional to 13,921.60, 20,880.96 and 13,109.44 is: 19,662.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,921.60 : 20,880.96 = 13,109.44 : x
  2. Step 2: Convert to fraction form
    13,921.60/20,880.96 = 13,109.44/x
  3. Step 3: Cross multiply
    13,921.60x = 20,880.96 × 13,109.44
  4. Step 4: Simplify right side
    13,921.60x = 273,737,692.26
  5. Step 5: Solve for x
    x = 273,737,692.26/13,921.60
  6. Step 6: Final answer
    x = 19,662.80

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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.