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Finding the Fourth Proportional to 19,112.60, 28,672.68 and 7,427

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Solution

The fourth proportional to 19,112.60, 28,672.68 and 7,427 is: 11,141.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,112.60 : 28,672.68 = 7,427 : x
  2. Step 2: Convert to fraction form
    19,112.60/28,672.68 = 7,427/x
  3. Step 3: Cross multiply
    19,112.60x = 28,672.68 × 7,427
  4. Step 4: Simplify right side
    19,112.60x = 212,951,994.36
  5. Step 5: Solve for x
    x = 212,951,994.36/19,112.60
  6. Step 6: Final answer
    x = 11,141.97

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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.