Home / 13,819.28-20,727.95-3,431.03

Finding the Fourth Proportional to 13,819.28, 20,727.95 and 3,431.03

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Solution

The fourth proportional to 13,819.28, 20,727.95 and 3,431.03 is: 5,146.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,819.28 : 20,727.95 = 3,431.03 : x
  2. Step 2: Convert to fraction form
    13,819.28/20,727.95 = 3,431.03/x
  3. Step 3: Cross multiply
    13,819.28x = 20,727.95 × 3,431.03
  4. Step 4: Simplify right side
    13,819.28x = 71,118,097.49
  5. Step 5: Solve for x
    x = 71,118,097.49/13,819.28
  6. Step 6: Final answer
    x = 5,146.30

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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.