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Finding the Fourth Proportional to 12,620.56, 18,933.09 and 4,187.57

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Solution

The fourth proportional to 12,620.56, 18,933.09 and 4,187.57 is: 6,282.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.56 : 18,933.09 = 4,187.57 : x
  2. Step 2: Convert to fraction form
    12,620.56/18,933.09 = 4,187.57/x
  3. Step 3: Cross multiply
    12,620.56x = 18,933.09 × 4,187.57
  4. Step 4: Simplify right side
    12,620.56x = 79,283,552.99
  5. Step 5: Solve for x
    x = 79,283,552.99/12,620.56
  6. Step 6: Final answer
    x = 6,282.10

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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.