Home / 20,175.21-27,839.05-11,221.56

Finding the Fourth Proportional to 20,175.21, 27,839.05 and 11,221.56

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Solution

The fourth proportional to 20,175.21, 27,839.05 and 11,221.56 is: 15,484.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,175.21 : 27,839.05 = 11,221.56 : x
  2. Step 2: Convert to fraction form
    20,175.21/27,839.05 = 11,221.56/x
  3. Step 3: Cross multiply
    20,175.21x = 27,839.05 × 11,221.56
  4. Step 4: Simplify right side
    20,175.21x = 312,397,541.86
  5. Step 5: Solve for x
    x = 312,397,541.86/20,175.21
  6. Step 6: Final answer
    x = 15,484.23

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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.