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Finding the Fourth Proportional to 28,745.88, 43,118.82 and 7,969.38

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Solution

The fourth proportional to 28,745.88, 43,118.82 and 7,969.38 is: 11,954.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,745.88 : 43,118.82 = 7,969.38 : x
  2. Step 2: Convert to fraction form
    28,745.88/43,118.82 = 7,969.38/x
  3. Step 3: Cross multiply
    28,745.88x = 43,118.82 × 7,969.38
  4. Step 4: Simplify right side
    28,745.88x = 343,630,006.29
  5. Step 5: Solve for x
    x = 343,630,006.29/28,745.88
  6. Step 6: Final answer
    x = 11,954.06

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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.