Home / 8,315.76-12,471.20-3,120.44

Finding the Fourth Proportional to 8,315.76, 12,471.20 and 3,120.44

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Solution

The fourth proportional to 8,315.76, 12,471.20 and 3,120.44 is: 4,679.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.76 : 12,471.20 = 3,120.44 : x
  2. Step 2: Convert to fraction form
    8,315.76/12,471.20 = 3,120.44/x
  3. Step 3: Cross multiply
    8,315.76x = 12,471.20 × 3,120.44
  4. Step 4: Simplify right side
    8,315.76x = 38,915,631.33
  5. Step 5: Solve for x
    x = 38,915,631.33/8,315.76
  6. Step 6: Final answer
    x = 4,679.74

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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.