Home / 20,090.90-27,724.84-11,137.88

Finding the Fourth Proportional to 20,090.90, 27,724.84 and 11,137.88

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Solution

The fourth proportional to 20,090.90, 27,724.84 and 11,137.88 is: 15,369.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.90 : 27,724.84 = 11,137.88 : x
  2. Step 2: Convert to fraction form
    20,090.90/27,724.84 = 11,137.88/x
  3. Step 3: Cross multiply
    20,090.90x = 27,724.84 × 11,137.88
  4. Step 4: Simplify right side
    20,090.90x = 308,795,982.41
  5. Step 5: Solve for x
    x = 308,795,982.41/20,090.90
  6. Step 6: Final answer
    x = 15,369.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.