Home / 11,385.10-17,114.10-8,120.80

Finding the Fourth Proportional to 11,385.10, 17,114.10 and 8,120.80

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Solution

The fourth proportional to 11,385.10, 17,114.10 and 8,120.80 is: 12,207.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,385.10 : 17,114.10 = 8,120.80 : x
  2. Step 2: Convert to fraction form
    11,385.10/17,114.10 = 8,120.80/x
  3. Step 3: Cross multiply
    11,385.10x = 17,114.10 × 8,120.80
  4. Step 4: Simplify right side
    11,385.10x = 138,980,183.28
  5. Step 5: Solve for x
    x = 138,980,183.28/11,385.10
  6. Step 6: Final answer
    x = 12,207.20

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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.