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Finding the Fourth Proportional to 20,260.78, 27,959.64 and 11,310.49

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Solution

The fourth proportional to 20,260.78, 27,959.64 and 11,310.49 is: 15,608.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,260.78 : 27,959.64 = 11,310.49 : x
  2. Step 2: Convert to fraction form
    20,260.78/27,959.64 = 11,310.49/x
  3. Step 3: Cross multiply
    20,260.78x = 27,959.64 × 11,310.49
  4. Step 4: Simplify right side
    20,260.78x = 316,237,228.62
  5. Step 5: Solve for x
    x = 316,237,228.62/20,260.78
  6. Step 6: Final answer
    x = 15,608.34

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.