Home / 12,117.44-16,716.96-8,139.84

Finding the Fourth Proportional to 12,117.44, 16,716.96 and 8,139.84

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Solution

The fourth proportional to 12,117.44, 16,716.96 and 8,139.84 is: 11,229.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,117.44 : 16,716.96 = 8,139.84 : x
  2. Step 2: Convert to fraction form
    12,117.44/16,716.96 = 8,139.84/x
  3. Step 3: Cross multiply
    12,117.44x = 16,716.96 × 8,139.84
  4. Step 4: Simplify right side
    12,117.44x = 136,073,379.69
  5. Step 5: Solve for x
    x = 136,073,379.69/12,117.44
  6. Step 6: Final answer
    x = 11,229.55

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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.