Home / 8,226.48-12,312.72-7,438.80

Finding the Fourth Proportional to 8,226.48, 12,312.72 and 7,438.80

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Solution

The fourth proportional to 8,226.48, 12,312.72 and 7,438.80 is: 11,133.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,226.48 : 12,312.72 = 7,438.80 : x
  2. Step 2: Convert to fraction form
    8,226.48/12,312.72 = 7,438.80/x
  3. Step 3: Cross multiply
    8,226.48x = 12,312.72 × 7,438.80
  4. Step 4: Simplify right side
    8,226.48x = 91,591,861.54
  5. Step 5: Solve for x
    x = 91,591,861.54/8,226.48
  6. Step 6: Final answer
    x = 11,133.79

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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.