Home / 20,090.18-27,724.46-11,137.78

Finding the Fourth Proportional to 20,090.18, 27,724.46 and 11,137.78

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Solution

The fourth proportional to 20,090.18, 27,724.46 and 11,137.78 is: 15,370.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.18 : 27,724.46 = 11,137.78 : x
  2. Step 2: Convert to fraction form
    20,090.18/27,724.46 = 11,137.78/x
  3. Step 3: Cross multiply
    20,090.18x = 27,724.46 × 11,137.78
  4. Step 4: Simplify right side
    20,090.18x = 308,788,936.10
  5. Step 5: Solve for x
    x = 308,788,936.10/20,090.18
  6. Step 6: Final answer
    x = 15,370.14

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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.