Home / 13,929.80-20,894.36-3,399.89

Finding the Fourth Proportional to 13,929.80, 20,894.36 and 3,399.89

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Solution

The fourth proportional to 13,929.80, 20,894.36 and 3,399.89 is: 5,099.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.80 : 20,894.36 = 3,399.89 : x
  2. Step 2: Convert to fraction form
    13,929.80/20,894.36 = 3,399.89/x
  3. Step 3: Cross multiply
    13,929.80x = 20,894.36 × 3,399.89
  4. Step 4: Simplify right side
    13,929.80x = 71,038,404.15
  5. Step 5: Solve for x
    x = 71,038,404.15/13,929.80
  6. Step 6: Final answer
    x = 5,099.75

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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.