Home / 20,238.39-27,910.17-13,420.44

Finding the Fourth Proportional to 20,238.39, 27,910.17 and 13,420.44

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Solution

The fourth proportional to 20,238.39, 27,910.17 and 13,420.44 is: 18,507.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,238.39 : 27,910.17 = 13,420.44 : x
  2. Step 2: Convert to fraction form
    20,238.39/27,910.17 = 13,420.44/x
  3. Step 3: Cross multiply
    20,238.39x = 27,910.17 × 13,420.44
  4. Step 4: Simplify right side
    20,238.39x = 374,566,761.87
  5. Step 5: Solve for x
    x = 374,566,761.87/20,238.39
  6. Step 6: Final answer
    x = 18,507.74

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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.