Home / 12,811.25-19,219.72-3,927.81

Finding the Fourth Proportional to 12,811.25, 19,219.72 and 3,927.81

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Solution

The fourth proportional to 12,811.25, 19,219.72 and 3,927.81 is: 5,892.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.25 : 19,219.72 = 3,927.81 : x
  2. Step 2: Convert to fraction form
    12,811.25/19,219.72 = 3,927.81/x
  3. Step 3: Cross multiply
    12,811.25x = 19,219.72 × 3,927.81
  4. Step 4: Simplify right side
    12,811.25x = 75,491,408.41
  5. Step 5: Solve for x
    x = 75,491,408.41/12,811.25
  6. Step 6: Final answer
    x = 5,892.59

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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.