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Finding the Fourth Proportional to 8,620.66, 12,928.63 and 2,379.18

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Solution

The fourth proportional to 8,620.66, 12,928.63 and 2,379.18 is: 3,568.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.66 : 12,928.63 = 2,379.18 : x
  2. Step 2: Convert to fraction form
    8,620.66/12,928.63 = 2,379.18/x
  3. Step 3: Cross multiply
    8,620.66x = 12,928.63 × 2,379.18
  4. Step 4: Simplify right side
    8,620.66x = 30,759,537.92
  5. Step 5: Solve for x
    x = 30,759,537.92/8,620.66
  6. Step 6: Final answer
    x = 3,568.12

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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.