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Finding the Fourth Proportional to 19,530, 26,951.40 and 11,146.68

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Solution

The fourth proportional to 19,530, 26,951.40 and 11,146.68 is: 15,382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,530 : 26,951.40 = 11,146.68 : x
  2. Step 2: Convert to fraction form
    19,530/26,951.40 = 11,146.68/x
  3. Step 3: Cross multiply
    19,530x = 26,951.40 × 11,146.68
  4. Step 4: Simplify right side
    19,530x = 300,418,631.35
  5. Step 5: Solve for x
    x = 300,418,631.35/19,530
  6. Step 6: Final answer
    x = 15,382.42

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Why These Related Problems?

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