Home / 13,811.87-20,717.78-3,423.62

Finding the Fourth Proportional to 13,811.87, 20,717.78 and 3,423.62

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Solution

The fourth proportional to 13,811.87, 20,717.78 and 3,423.62 is: 5,135.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.87 : 20,717.78 = 3,423.62 : x
  2. Step 2: Convert to fraction form
    13,811.87/20,717.78 = 3,423.62/x
  3. Step 3: Cross multiply
    13,811.87x = 20,717.78 × 3,423.62
  4. Step 4: Simplify right side
    13,811.87x = 70,929,710.93
  5. Step 5: Solve for x
    x = 70,929,710.93/13,811.87
  6. Step 6: Final answer
    x = 5,135.42

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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.