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Finding the Fourth Proportional to 19,940.76, 29,901.06 and 6,788.76

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Solution

The fourth proportional to 19,940.76, 29,901.06 and 6,788.76 is: 10,179.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,940.76 : 29,901.06 = 6,788.76 : x
  2. Step 2: Convert to fraction form
    19,940.76/29,901.06 = 6,788.76/x
  3. Step 3: Cross multiply
    19,940.76x = 29,901.06 × 6,788.76
  4. Step 4: Simplify right side
    19,940.76x = 202,991,120.09
  5. Step 5: Solve for x
    x = 202,991,120.09/19,940.76
  6. Step 6: Final answer
    x = 10,179.71

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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.