Home / 20,120.22-27,777.69-13,415.22

Finding the Fourth Proportional to 20,120.22, 27,777.69 and 13,415.22

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Solution

The fourth proportional to 20,120.22, 27,777.69 and 13,415.22 is: 18,520.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.22 : 27,777.69 = 13,415.22 : x
  2. Step 2: Convert to fraction form
    20,120.22/27,777.69 = 13,415.22/x
  3. Step 3: Cross multiply
    20,120.22x = 27,777.69 × 13,415.22
  4. Step 4: Simplify right side
    20,120.22x = 372,643,822.44
  5. Step 5: Solve for x
    x = 372,643,822.44/20,120.22
  6. Step 6: Final answer
    x = 18,520.86

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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.