Home / 20,856.06-31,280.31-8,375.58

Finding the Fourth Proportional to 20,856.06, 31,280.31 and 8,375.58

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Solution

The fourth proportional to 20,856.06, 31,280.31 and 8,375.58 is: 12,561.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.06 : 31,280.31 = 8,375.58 : x
  2. Step 2: Convert to fraction form
    20,856.06/31,280.31 = 8,375.58/x
  3. Step 3: Cross multiply
    20,856.06x = 31,280.31 × 8,375.58
  4. Step 4: Simplify right side
    20,856.06x = 261,990,738.83
  5. Step 5: Solve for x
    x = 261,990,738.83/20,856.06
  6. Step 6: Final answer
    x = 12,561.85

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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.