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Finding the Fourth Proportional to 13,406.80, 20,106.60 and 4,046.80

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Solution

The fourth proportional to 13,406.80, 20,106.60 and 4,046.80 is: 6,069.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,406.80 : 20,106.60 = 4,046.80 : x
  2. Step 2: Convert to fraction form
    13,406.80/20,106.60 = 4,046.80/x
  3. Step 3: Cross multiply
    13,406.80x = 20,106.60 × 4,046.80
  4. Step 4: Simplify right side
    13,406.80x = 81,367,388.88
  5. Step 5: Solve for x
    x = 81,367,388.88/13,406.80
  6. Step 6: Final answer
    x = 6,069.11

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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.