Home / 13,913.20-20,869.64-3,383.28

Finding the Fourth Proportional to 13,913.20, 20,869.64 and 3,383.28

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Solution

The fourth proportional to 13,913.20, 20,869.64 and 3,383.28 is: 5,074.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.20 : 20,869.64 = 3,383.28 : x
  2. Step 2: Convert to fraction form
    13,913.20/20,869.64 = 3,383.28/x
  3. Step 3: Cross multiply
    13,913.20x = 20,869.64 × 3,383.28
  4. Step 4: Simplify right side
    13,913.20x = 70,607,835.62
  5. Step 5: Solve for x
    x = 70,607,835.62/13,913.20
  6. Step 6: Final answer
    x = 5,074.88

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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.