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Finding the Fourth Proportional to 13,468.80, 20,193.60 and 5,145.60

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Solution

The fourth proportional to 13,468.80, 20,193.60 and 5,145.60 is: 7,714.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,468.80 : 20,193.60 = 5,145.60 : x
  2. Step 2: Convert to fraction form
    13,468.80/20,193.60 = 5,145.60/x
  3. Step 3: Cross multiply
    13,468.80x = 20,193.60 × 5,145.60
  4. Step 4: Simplify right side
    13,468.80x = 103,908,188.16
  5. Step 5: Solve for x
    x = 103,908,188.16/13,468.80
  6. Step 6: Final answer
    x = 7,714.73

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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.