Home / 3,618.45-5,421.99-2,156.79

Finding the Fourth Proportional to 3,618.45, 5,421.99 and 2,156.79

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Solution

The fourth proportional to 3,618.45, 5,421.99 and 2,156.79 is: 3,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.45 : 5,421.99 = 2,156.79 : x
  2. Step 2: Convert to fraction form
    3,618.45/5,421.99 = 2,156.79/x
  3. Step 3: Cross multiply
    3,618.45x = 5,421.99 × 2,156.79
  4. Step 4: Simplify right side
    3,618.45x = 11,694,093.81
  5. Step 5: Solve for x
    x = 11,694,093.81/3,618.45
  6. Step 6: Final answer
    x = 3,231.80

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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.