Home / 11,885.87-17,811.78-6,680.81

Finding the Fourth Proportional to 11,885.87, 17,811.78 and 6,680.81

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Solution

The fourth proportional to 11,885.87, 17,811.78 and 6,680.81 is: 10,011.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,885.87 : 17,811.78 = 6,680.81 : x
  2. Step 2: Convert to fraction form
    11,885.87/17,811.78 = 6,680.81/x
  3. Step 3: Cross multiply
    11,885.87x = 17,811.78 × 6,680.81
  4. Step 4: Simplify right side
    11,885.87x = 118,997,028.88
  5. Step 5: Solve for x
    x = 118,997,028.88/11,885.87
  6. Step 6: Final answer
    x = 10,011.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.