Home / 13,829.80-20,744.70-3,969.40

Finding the Fourth Proportional to 13,829.80, 20,744.70 and 3,969.40

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Solution

The fourth proportional to 13,829.80, 20,744.70 and 3,969.40 is: 5,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,829.80 : 20,744.70 = 3,969.40 : x
  2. Step 2: Convert to fraction form
    13,829.80/20,744.70 = 3,969.40/x
  3. Step 3: Cross multiply
    13,829.80x = 20,744.70 × 3,969.40
  4. Step 4: Simplify right side
    13,829.80x = 82,344,012.18
  5. Step 5: Solve for x
    x = 82,344,012.18/13,829.80
  6. Step 6: Final answer
    x = 5,954.10

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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.