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Finding the Fourth Proportional to 8,639.87, 12,962.54 and 3,093.08

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Solution

The fourth proportional to 8,639.87, 12,962.54 and 3,093.08 is: 4,640.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.87 : 12,962.54 = 3,093.08 : x
  2. Step 2: Convert to fraction form
    8,639.87/12,962.54 = 3,093.08/x
  3. Step 3: Cross multiply
    8,639.87x = 12,962.54 × 3,093.08
  4. Step 4: Simplify right side
    8,639.87x = 40,094,173.22
  5. Step 5: Solve for x
    x = 40,094,173.22/8,639.87
  6. Step 6: Final answer
    x = 4,640.60

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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.