Home / 5,815.82-8,721-2,115.44

Finding the Fourth Proportional to 5,815.82, 8,721 and 2,115.44

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Solution

The fourth proportional to 5,815.82, 8,721 and 2,115.44 is: 3,172.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.82 : 8,721 = 2,115.44 : x
  2. Step 2: Convert to fraction form
    5,815.82/8,721 = 2,115.44/x
  3. Step 3: Cross multiply
    5,815.82x = 8,721 × 2,115.44
  4. Step 4: Simplify right side
    5,815.82x = 18,448,752.24
  5. Step 5: Solve for x
    x = 18,448,752.24/5,815.82
  6. Step 6: Final answer
    x = 3,172.17

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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.