Home / 20,928.20-31,408.77-18,467.96

Finding the Fourth Proportional to 20,928.20, 31,408.77 and 18,467.96

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Solution

The fourth proportional to 20,928.20, 31,408.77 and 18,467.96 is: 27,716.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.20 : 31,408.77 = 18,467.96 : x
  2. Step 2: Convert to fraction form
    20,928.20/31,408.77 = 18,467.96/x
  3. Step 3: Cross multiply
    20,928.20x = 31,408.77 × 18,467.96
  4. Step 4: Simplify right side
    20,928.20x = 580,055,908.01
  5. Step 5: Solve for x
    x = 580,055,908.01/20,928.20
  6. Step 6: Final answer
    x = 27,716.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.