Home / 20,961.15-31,441.97-8,313.99

Finding the Fourth Proportional to 20,961.15, 31,441.97 and 8,313.99

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Solution

The fourth proportional to 20,961.15, 31,441.97 and 8,313.99 is: 12,471.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.15 : 31,441.97 = 8,313.99 : x
  2. Step 2: Convert to fraction form
    20,961.15/31,441.97 = 8,313.99/x
  3. Step 3: Cross multiply
    20,961.15x = 31,441.97 × 8,313.99
  4. Step 4: Simplify right side
    20,961.15x = 261,408,025.38
  5. Step 5: Solve for x
    x = 261,408,025.38/20,961.15
  6. Step 6: Final answer
    x = 12,471.08

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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.