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Finding the Fourth Proportional to 19,138.38, 28,701.99 and 7,448.82

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Solution

The fourth proportional to 19,138.38, 28,701.99 and 7,448.82 is: 11,171.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.38 : 28,701.99 = 7,448.82 : x
  2. Step 2: Convert to fraction form
    19,138.38/28,701.99 = 7,448.82/x
  3. Step 3: Cross multiply
    19,138.38x = 28,701.99 × 7,448.82
  4. Step 4: Simplify right side
    19,138.38x = 213,795,957.15
  5. Step 5: Solve for x
    x = 213,795,957.15/19,138.38
  6. Step 6: Final answer
    x = 11,171.06

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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.