Home / 13,811.85-20,717.75-3,423.60

Finding the Fourth Proportional to 13,811.85, 20,717.75 and 3,423.60

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Solution

The fourth proportional to 13,811.85, 20,717.75 and 3,423.60 is: 5,135.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.85 : 20,717.75 = 3,423.60 : x
  2. Step 2: Convert to fraction form
    13,811.85/20,717.75 = 3,423.60/x
  3. Step 3: Cross multiply
    13,811.85x = 20,717.75 × 3,423.60
  4. Step 4: Simplify right side
    13,811.85x = 70,929,297.46
  5. Step 5: Solve for x
    x = 70,929,297.46/13,811.85
  6. Step 6: Final answer
    x = 5,135.39

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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.