Home / 20,138.85-27,791.01-11,064.20

Finding the Fourth Proportional to 20,138.85, 27,791.01 and 11,064.20

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Solution

The fourth proportional to 20,138.85, 27,791.01 and 11,064.20 is: 15,268.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.85 : 27,791.01 = 11,064.20 : x
  2. Step 2: Convert to fraction form
    20,138.85/27,791.01 = 11,064.20/x
  3. Step 3: Cross multiply
    20,138.85x = 27,791.01 × 11,064.20
  4. Step 4: Simplify right side
    20,138.85x = 307,485,153.89
  5. Step 5: Solve for x
    x = 307,485,153.89/20,138.85
  6. Step 6: Final answer
    x = 15,268.26

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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.