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Finding the Fourth Proportional to 12,630.84, 18,940.50 and 8,181.24

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Solution

The fourth proportional to 12,630.84, 18,940.50 and 8,181.24 is: 12,268.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630.84 : 18,940.50 = 8,181.24 : x
  2. Step 2: Convert to fraction form
    12,630.84/18,940.50 = 8,181.24/x
  3. Step 3: Cross multiply
    12,630.84x = 18,940.50 × 8,181.24
  4. Step 4: Simplify right side
    12,630.84x = 154,956,776.22
  5. Step 5: Solve for x
    x = 154,956,776.22/12,630.84
  6. Step 6: Final answer
    x = 12,268.13

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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.