Home / 20,090.78-27,725.24-11,138.06

Finding the Fourth Proportional to 20,090.78, 27,725.24 and 11,138.06

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Solution

The fourth proportional to 20,090.78, 27,725.24 and 11,138.06 is: 15,370.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,090.78 : 27,725.24 = 11,138.06 : x
  2. Step 2: Convert to fraction form
    20,090.78/27,725.24 = 11,138.06/x
  3. Step 3: Cross multiply
    20,090.78x = 27,725.24 × 11,138.06
  4. Step 4: Simplify right side
    20,090.78x = 308,805,265.19
  5. Step 5: Solve for x
    x = 308,805,265.19/20,090.78
  6. Step 6: Final answer
    x = 15,370.49

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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.