Home / 11,729.75-16,186.91-6,424.56

Finding the Fourth Proportional to 11,729.75, 16,186.91 and 6,424.56

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Solution

The fourth proportional to 11,729.75, 16,186.91 and 6,424.56 is: 8,865.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,729.75 : 16,186.91 = 6,424.56 : x
  2. Step 2: Convert to fraction form
    11,729.75/16,186.91 = 6,424.56/x
  3. Step 3: Cross multiply
    11,729.75x = 16,186.91 × 6,424.56
  4. Step 4: Simplify right side
    11,729.75x = 103,993,742.39
  5. Step 5: Solve for x
    x = 103,993,742.39/11,729.75
  6. Step 6: Final answer
    x = 8,865.81

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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.