Home / 11,680.91-16,120.01-6,645.86

Finding the Fourth Proportional to 11,680.91, 16,120.01 and 6,645.86

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Solution

The fourth proportional to 11,680.91, 16,120.01 and 6,645.86 is: 9,171.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,680.91 : 16,120.01 = 6,645.86 : x
  2. Step 2: Convert to fraction form
    11,680.91/16,120.01 = 6,645.86/x
  3. Step 3: Cross multiply
    11,680.91x = 16,120.01 × 6,645.86
  4. Step 4: Simplify right side
    11,680.91x = 107,131,329.66
  5. Step 5: Solve for x
    x = 107,131,329.66/11,680.91
  6. Step 6: Final answer
    x = 9,171.49

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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.