Home / 28,745.85-43,115.31-7,687.47

Finding the Fourth Proportional to 28,745.85, 43,115.31 and 7,687.47

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Solution

The fourth proportional to 28,745.85, 43,115.31 and 7,687.47 is: 11,530.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,745.85 : 43,115.31 = 7,687.47 : x
  2. Step 2: Convert to fraction form
    28,745.85/43,115.31 = 7,687.47/x
  3. Step 3: Cross multiply
    28,745.85x = 43,115.31 × 7,687.47
  4. Step 4: Simplify right side
    28,745.85x = 331,447,652.17
  5. Step 5: Solve for x
    x = 331,447,652.17/28,745.85
  6. Step 6: Final answer
    x = 11,530.28

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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.