Home / 13,815.28-20,722.84-3,427

Finding the Fourth Proportional to 13,815.28, 20,722.84 and 3,427

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Solution

The fourth proportional to 13,815.28, 20,722.84 and 3,427 is: 5,140.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.28 : 20,722.84 = 3,427 : x
  2. Step 2: Convert to fraction form
    13,815.28/20,722.84 = 3,427/x
  3. Step 3: Cross multiply
    13,815.28x = 20,722.84 × 3,427
  4. Step 4: Simplify right side
    13,815.28x = 71,017,172.68
  5. Step 5: Solve for x
    x = 71,017,172.68/13,815.28
  6. Step 6: Final answer
    x = 5,140.48

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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.