Home / 13,828.78-20,743.13-3,440.53

Finding the Fourth Proportional to 13,828.78, 20,743.13 and 3,440.53

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Solution

The fourth proportional to 13,828.78, 20,743.13 and 3,440.53 is: 5,160.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,828.78 : 20,743.13 = 3,440.53 : x
  2. Step 2: Convert to fraction form
    13,828.78/20,743.13 = 3,440.53/x
  3. Step 3: Cross multiply
    13,828.78x = 20,743.13 × 3,440.53
  4. Step 4: Simplify right side
    13,828.78x = 71,367,361.06
  5. Step 5: Solve for x
    x = 71,367,361.06/13,828.78
  6. Step 6: Final answer
    x = 5,160.79

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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.