Home / 7,638.12-11,456.64-2,091.24

Finding the Fourth Proportional to 7,638.12, 11,456.64 and 2,091.24

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Solution

The fourth proportional to 7,638.12, 11,456.64 and 2,091.24 is: 3,136.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,638.12 : 11,456.64 = 2,091.24 : x
  2. Step 2: Convert to fraction form
    7,638.12/11,456.64 = 2,091.24/x
  3. Step 3: Cross multiply
    7,638.12x = 11,456.64 × 2,091.24
  4. Step 4: Simplify right side
    7,638.12x = 23,958,583.83
  5. Step 5: Solve for x
    x = 23,958,583.83/7,638.12
  6. Step 6: Final answer
    x = 3,136.71

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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.