Home / 20,145.22-27,791.46-13,424.30

Finding the Fourth Proportional to 20,145.22, 27,791.46 and 13,424.30

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Solution

The fourth proportional to 20,145.22, 27,791.46 and 13,424.30 is: 18,519.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.22 : 27,791.46 = 13,424.30 : x
  2. Step 2: Convert to fraction form
    20,145.22/27,791.46 = 13,424.30/x
  3. Step 3: Cross multiply
    20,145.22x = 27,791.46 × 13,424.30
  4. Step 4: Simplify right side
    20,145.22x = 373,080,896.48
  5. Step 5: Solve for x
    x = 373,080,896.48/20,145.22
  6. Step 6: Final answer
    x = 18,519.57

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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.