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Finding the Fourth Proportional to 18,843.60, 28,249.20 and 9,609.60

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Solution

The fourth proportional to 18,843.60, 28,249.20 and 9,609.60 is: 14,406.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.60 : 28,249.20 = 9,609.60 : x
  2. Step 2: Convert to fraction form
    18,843.60/28,249.20 = 9,609.60/x
  3. Step 3: Cross multiply
    18,843.60x = 28,249.20 × 9,609.60
  4. Step 4: Simplify right side
    18,843.60x = 271,463,512.32
  5. Step 5: Solve for x
    x = 271,463,512.32/18,843.60
  6. Step 6: Final answer
    x = 14,406.14

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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.