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Finding the Fourth Proportional to 12,185.41, 18,284.94 and 6,639.14

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Solution

The fourth proportional to 12,185.41, 18,284.94 and 6,639.14 is: 9,962.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.41 : 18,284.94 = 6,639.14 : x
  2. Step 2: Convert to fraction form
    12,185.41/18,284.94 = 6,639.14/x
  3. Step 3: Cross multiply
    12,185.41x = 18,284.94 × 6,639.14
  4. Step 4: Simplify right side
    12,185.41x = 121,396,185.13
  5. Step 5: Solve for x
    x = 121,396,185.13/12,185.41
  6. Step 6: Final answer
    x = 9,962.43

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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.