Home / 11,821.25-17,731.79-6,820.37

Finding the Fourth Proportional to 11,821.25, 17,731.79 and 6,820.37

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Solution

The fourth proportional to 11,821.25, 17,731.79 and 6,820.37 is: 10,230.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.25 : 17,731.79 = 6,820.37 : x
  2. Step 2: Convert to fraction form
    11,821.25/17,731.79 = 6,820.37/x
  3. Step 3: Cross multiply
    11,821.25x = 17,731.79 × 6,820.37
  4. Step 4: Simplify right side
    11,821.25x = 120,937,368.56
  5. Step 5: Solve for x
    x = 120,937,368.56/11,821.25
  6. Step 6: Final answer
    x = 10,230.51

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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.