Home / 11,236.80-16,855.20-8,320.80

Finding the Fourth Proportional to 11,236.80, 16,855.20 and 8,320.80

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Solution

The fourth proportional to 11,236.80, 16,855.20 and 8,320.80 is: 12,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,236.80 : 16,855.20 = 8,320.80 : x
  2. Step 2: Convert to fraction form
    11,236.80/16,855.20 = 8,320.80/x
  3. Step 3: Cross multiply
    11,236.80x = 16,855.20 × 8,320.80
  4. Step 4: Simplify right side
    11,236.80x = 140,248,748.16
  5. Step 5: Solve for x
    x = 140,248,748.16/11,236.80
  6. Step 6: Final answer
    x = 12,481.20

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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.