Home / 8,187.14-12,278.12-2,639.28

Finding the Fourth Proportional to 8,187.14, 12,278.12 and 2,639.28

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Solution

The fourth proportional to 8,187.14, 12,278.12 and 2,639.28 is: 3,958.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,187.14 : 12,278.12 = 2,639.28 : x
  2. Step 2: Convert to fraction form
    8,187.14/12,278.12 = 2,639.28/x
  3. Step 3: Cross multiply
    8,187.14x = 12,278.12 × 2,639.28
  4. Step 4: Simplify right side
    8,187.14x = 32,405,396.55
  5. Step 5: Solve for x
    x = 32,405,396.55/8,187.14
  6. Step 6: Final answer
    x = 3,958.09

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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.