Home / 13,813.62-20,720.40-3,425.37

Finding the Fourth Proportional to 13,813.62, 20,720.40 and 3,425.37

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Solution

The fourth proportional to 13,813.62, 20,720.40 and 3,425.37 is: 5,138.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,813.62 : 20,720.40 = 3,425.37 : x
  2. Step 2: Convert to fraction form
    13,813.62/20,720.40 = 3,425.37/x
  3. Step 3: Cross multiply
    13,813.62x = 20,720.40 × 3,425.37
  4. Step 4: Simplify right side
    13,813.62x = 70,975,036.55
  5. Step 5: Solve for x
    x = 70,975,036.55/13,813.62
  6. Step 6: Final answer
    x = 5,138.05

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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.