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Finding the Fourth Proportional to 8,118.95, 12,199.68 and 7,081.54

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Solution

The fourth proportional to 8,118.95, 12,199.68 and 7,081.54 is: 10,640.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.95 : 12,199.68 = 7,081.54 : x
  2. Step 2: Convert to fraction form
    8,118.95/12,199.68 = 7,081.54/x
  3. Step 3: Cross multiply
    8,118.95x = 12,199.68 × 7,081.54
  4. Step 4: Simplify right side
    8,118.95x = 86,392,491.41
  5. Step 5: Solve for x
    x = 86,392,491.41/8,118.95
  6. Step 6: Final answer
    x = 10,640.85

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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.