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Finding the Fourth Proportional to 12,008.50, 18,012.83 and 3,800.50

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Solution

The fourth proportional to 12,008.50, 18,012.83 and 3,800.50 is: 5,700.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,008.50 : 18,012.83 = 3,800.50 : x
  2. Step 2: Convert to fraction form
    12,008.50/18,012.83 = 3,800.50/x
  3. Step 3: Cross multiply
    12,008.50x = 18,012.83 × 3,800.50
  4. Step 4: Simplify right side
    12,008.50x = 68,457,760.42
  5. Step 5: Solve for x
    x = 68,457,760.42/12,008.50
  6. Step 6: Final answer
    x = 5,700.78

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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.