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Finding the Fourth Proportional to 11,855.20, 17,797.20 and 8,910.40

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Solution

The fourth proportional to 11,855.20, 17,797.20 and 8,910.40 is: 13,376.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,855.20 : 17,797.20 = 8,910.40 : x
  2. Step 2: Convert to fraction form
    11,855.20/17,797.20 = 8,910.40/x
  3. Step 3: Cross multiply
    11,855.20x = 17,797.20 × 8,910.40
  4. Step 4: Simplify right side
    11,855.20x = 158,580,170.88
  5. Step 5: Solve for x
    x = 158,580,170.88/11,855.20
  6. Step 6: Final answer
    x = 13,376.42

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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.