Home / 12,120.82-16,707.67-11,103.86

Finding the Fourth Proportional to 12,120.82, 16,707.67 and 11,103.86

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Solution

The fourth proportional to 12,120.82, 16,707.67 and 11,103.86 is: 15,305.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.82 : 16,707.67 = 11,103.86 : x
  2. Step 2: Convert to fraction form
    12,120.82/16,707.67 = 11,103.86/x
  3. Step 3: Cross multiply
    12,120.82x = 16,707.67 × 11,103.86
  4. Step 4: Simplify right side
    12,120.82x = 185,519,642.62
  5. Step 5: Solve for x
    x = 185,519,642.62/12,120.82
  6. Step 6: Final answer
    x = 15,305.87

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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.