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Finding the Fourth Proportional to 18,893.79, 28,339.34 and 5,745.38

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Solution

The fourth proportional to 18,893.79, 28,339.34 and 5,745.38 is: 8,617.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,893.79 : 28,339.34 = 5,745.38 : x
  2. Step 2: Convert to fraction form
    18,893.79/28,339.34 = 5,745.38/x
  3. Step 3: Cross multiply
    18,893.79x = 28,339.34 × 5,745.38
  4. Step 4: Simplify right side
    18,893.79x = 162,820,106.83
  5. Step 5: Solve for x
    x = 162,820,106.83/18,893.79
  6. Step 6: Final answer
    x = 8,617.65

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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.