Home / 5,428.44-8,142.30-2,142.09

Finding the Fourth Proportional to 5,428.44, 8,142.30 and 2,142.09

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Solution

The fourth proportional to 5,428.44, 8,142.30 and 2,142.09 is: 3,212.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.44 : 8,142.30 = 2,142.09 : x
  2. Step 2: Convert to fraction form
    5,428.44/8,142.30 = 2,142.09/x
  3. Step 3: Cross multiply
    5,428.44x = 8,142.30 × 2,142.09
  4. Step 4: Simplify right side
    5,428.44x = 17,441,539.41
  5. Step 5: Solve for x
    x = 17,441,539.41/5,428.44
  6. Step 6: Final answer
    x = 3,212.99

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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.