Home / 20,912.43-28,846.46-12,408.95

Finding the Fourth Proportional to 20,912.43, 28,846.46 and 12,408.95

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Solution

The fourth proportional to 20,912.43, 28,846.46 and 12,408.95 is: 17,116.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.43 : 28,846.46 = 12,408.95 : x
  2. Step 2: Convert to fraction form
    20,912.43/28,846.46 = 12,408.95/x
  3. Step 3: Cross multiply
    20,912.43x = 28,846.46 × 12,408.95
  4. Step 4: Simplify right side
    20,912.43x = 357,954,135.58
  5. Step 5: Solve for x
    x = 357,954,135.58/20,912.43
  6. Step 6: Final answer
    x = 17,116.81

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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.