Home / 20,697.15-31,049.91-8,214.78

Finding the Fourth Proportional to 20,697.15, 31,049.91 and 8,214.78

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Solution

The fourth proportional to 20,697.15, 31,049.91 and 8,214.78 is: 12,323.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.15 : 31,049.91 = 8,214.78 : x
  2. Step 2: Convert to fraction form
    20,697.15/31,049.91 = 8,214.78/x
  3. Step 3: Cross multiply
    20,697.15x = 31,049.91 × 8,214.78
  4. Step 4: Simplify right side
    20,697.15x = 255,068,179.67
  5. Step 5: Solve for x
    x = 255,068,179.67/20,697.15
  6. Step 6: Final answer
    x = 12,323.83

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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.