Home / 11,241.20-16,861.80-8,130.80

Finding the Fourth Proportional to 11,241.20, 16,861.80 and 8,130.80

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Solution

The fourth proportional to 11,241.20, 16,861.80 and 8,130.80 is: 12,196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,241.20 : 16,861.80 = 8,130.80 : x
  2. Step 2: Convert to fraction form
    11,241.20/16,861.80 = 8,130.80/x
  3. Step 3: Cross multiply
    11,241.20x = 16,861.80 × 8,130.80
  4. Step 4: Simplify right side
    11,241.20x = 137,099,923.44
  5. Step 5: Solve for x
    x = 137,099,923.44/11,241.20
  6. Step 6: Final answer
    x = 12,196.20

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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.