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Finding the Fourth Proportional to 28,424.44, 42,651.06 and 19,171

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Solution

The fourth proportional to 28,424.44, 42,651.06 and 19,171 is: 28,766.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,424.44 : 42,651.06 = 19,171 : x
  2. Step 2: Convert to fraction form
    28,424.44/42,651.06 = 19,171/x
  3. Step 3: Cross multiply
    28,424.44x = 42,651.06 × 19,171
  4. Step 4: Simplify right side
    28,424.44x = 817,663,471.26
  5. Step 5: Solve for x
    x = 817,663,471.26/28,424.44
  6. Step 6: Final answer
    x = 28,766.21

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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.