Home / 20,090.88-27,724.41-11,138.28

Finding the Fourth Proportional to 20,090.88, 27,724.41 and 11,138.28

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Solution

The fourth proportional to 20,090.88, 27,724.41 and 11,138.28 is: 15,370.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.88 : 27,724.41 = 11,138.28 : x
  2. Step 2: Convert to fraction form
    20,090.88/27,724.41 = 11,138.28/x
  3. Step 3: Cross multiply
    20,090.88x = 27,724.41 × 11,138.28
  4. Step 4: Simplify right side
    20,090.88x = 308,802,241.41
  5. Step 5: Solve for x
    x = 308,802,241.41/20,090.88
  6. Step 6: Final answer
    x = 15,370.27

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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.