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Finding the Fourth Proportional to 18,745.26, 28,112.42 and 8,881.90

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Solution

The fourth proportional to 18,745.26, 28,112.42 and 8,881.90 is: 13,320.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,745.26 : 28,112.42 = 8,881.90 : x
  2. Step 2: Convert to fraction form
    18,745.26/28,112.42 = 8,881.90/x
  3. Step 3: Cross multiply
    18,745.26x = 28,112.42 × 8,881.90
  4. Step 4: Simplify right side
    18,745.26x = 249,691,703.20
  5. Step 5: Solve for x
    x = 249,691,703.20/18,745.26
  6. Step 6: Final answer
    x = 13,320.26

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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.