Home / 11,682.20-16,120.76-6,645.72

Finding the Fourth Proportional to 11,682.20, 16,120.76 and 6,645.72

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Solution

The fourth proportional to 11,682.20, 16,120.76 and 6,645.72 is: 9,170.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,682.20 : 16,120.76 = 6,645.72 : x
  2. Step 2: Convert to fraction form
    11,682.20/16,120.76 = 6,645.72/x
  3. Step 3: Cross multiply
    11,682.20x = 16,120.76 × 6,645.72
  4. Step 4: Simplify right side
    11,682.20x = 107,134,057.15
  5. Step 5: Solve for x
    x = 107,134,057.15/11,682.20
  6. Step 6: Final answer
    x = 9,170.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.