Home / 8,286.20-12,427.36-5,315.66

Finding the Fourth Proportional to 8,286.20, 12,427.36 and 5,315.66

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Solution

The fourth proportional to 8,286.20, 12,427.36 and 5,315.66 is: 7,972.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,286.20 : 12,427.36 = 5,315.66 : x
  2. Step 2: Convert to fraction form
    8,286.20/12,427.36 = 5,315.66/x
  3. Step 3: Cross multiply
    8,286.20x = 12,427.36 × 5,315.66
  4. Step 4: Simplify right side
    8,286.20x = 66,059,545.03
  5. Step 5: Solve for x
    x = 66,059,545.03/8,286.20
  6. Step 6: Final answer
    x = 7,972.24

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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.