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Finding the Fourth Proportional to 18,964.25, 28,447.73 and 7,277.46

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Solution

The fourth proportional to 18,964.25, 28,447.73 and 7,277.46 is: 10,916.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.25 : 28,447.73 = 7,277.46 : x
  2. Step 2: Convert to fraction form
    18,964.25/28,447.73 = 7,277.46/x
  3. Step 3: Cross multiply
    18,964.25x = 28,447.73 × 7,277.46
  4. Step 4: Simplify right side
    18,964.25x = 207,027,235.36
  5. Step 5: Solve for x
    x = 207,027,235.36/18,964.25
  6. Step 6: Final answer
    x = 10,916.71

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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.