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Finding the Fourth Proportional to 8,482.39, 12,719.90 and 2,639.45

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Solution

The fourth proportional to 8,482.39, 12,719.90 and 2,639.45 is: 3,958.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,482.39 : 12,719.90 = 2,639.45 : x
  2. Step 2: Convert to fraction form
    8,482.39/12,719.90 = 2,639.45/x
  3. Step 3: Cross multiply
    8,482.39x = 12,719.90 × 2,639.45
  4. Step 4: Simplify right side
    8,482.39x = 33,573,578.45
  5. Step 5: Solve for x
    x = 33,573,578.45/8,482.39
  6. Step 6: Final answer
    x = 3,958.03

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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.