Home / 13,855.60-20,786.22-5,090.56

Finding the Fourth Proportional to 13,855.60, 20,786.22 and 5,090.56

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Solution

The fourth proportional to 13,855.60, 20,786.22 and 5,090.56 is: 7,636.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.60 : 20,786.22 = 5,090.56 : x
  2. Step 2: Convert to fraction form
    13,855.60/20,786.22 = 5,090.56/x
  3. Step 3: Cross multiply
    13,855.60x = 20,786.22 × 5,090.56
  4. Step 4: Simplify right side
    13,855.60x = 105,813,500.08
  5. Step 5: Solve for x
    x = 105,813,500.08/13,855.60
  6. Step 6: Final answer
    x = 7,636.88

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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.