Home / 11,270.40-16,891.20-8,188.80

Finding the Fourth Proportional to 11,270.40, 16,891.20 and 8,188.80

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Solution

The fourth proportional to 11,270.40, 16,891.20 and 8,188.80 is: 12,272.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,270.40 : 16,891.20 = 8,188.80 : x
  2. Step 2: Convert to fraction form
    11,270.40/16,891.20 = 8,188.80/x
  3. Step 3: Cross multiply
    11,270.40x = 16,891.20 × 8,188.80
  4. Step 4: Simplify right side
    11,270.40x = 138,318,658.56
  5. Step 5: Solve for x
    x = 138,318,658.56/11,270.40
  6. Step 6: Final answer
    x = 12,272.74

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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.