Home / 20,818.32-31,229.52-6,777.72

Finding the Fourth Proportional to 20,818.32, 31,229.52 and 6,777.72

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Solution

The fourth proportional to 20,818.32, 31,229.52 and 6,777.72 is: 10,167.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.32 : 31,229.52 = 6,777.72 : x
  2. Step 2: Convert to fraction form
    20,818.32/31,229.52 = 6,777.72/x
  3. Step 3: Cross multiply
    20,818.32x = 31,229.52 × 6,777.72
  4. Step 4: Simplify right side
    20,818.32x = 211,664,942.29
  5. Step 5: Solve for x
    x = 211,664,942.29/20,818.32
  6. Step 6: Final answer
    x = 10,167.24

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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.