Home / 8,155.71-12,229.60-3,990.84

Finding the Fourth Proportional to 8,155.71, 12,229.60 and 3,990.84

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Solution

The fourth proportional to 8,155.71, 12,229.60 and 3,990.84 is: 5,984.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,155.71 : 12,229.60 = 3,990.84 : x
  2. Step 2: Convert to fraction form
    8,155.71/12,229.60 = 3,990.84/x
  3. Step 3: Cross multiply
    8,155.71x = 12,229.60 × 3,990.84
  4. Step 4: Simplify right side
    8,155.71x = 48,806,376.86
  5. Step 5: Solve for x
    x = 48,806,376.86/8,155.71
  6. Step 6: Final answer
    x = 5,984.32

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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.