Home / 7,129.80-10,687.14-2,745.36

Finding the Fourth Proportional to 7,129.80, 10,687.14 and 2,745.36

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Solution

The fourth proportional to 7,129.80, 10,687.14 and 2,745.36 is: 4,115.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.80 : 10,687.14 = 2,745.36 : x
  2. Step 2: Convert to fraction form
    7,129.80/10,687.14 = 2,745.36/x
  3. Step 3: Cross multiply
    7,129.80x = 10,687.14 × 2,745.36
  4. Step 4: Simplify right side
    7,129.80x = 29,340,046.67
  5. Step 5: Solve for x
    x = 29,340,046.67/7,129.80
  6. Step 6: Final answer
    x = 4,115.13

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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.