Home / 5,418.84-8,131.50-3,111.96

Finding the Fourth Proportional to 5,418.84, 8,131.50 and 3,111.96

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Solution

The fourth proportional to 5,418.84, 8,131.50 and 3,111.96 is: 4,669.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.84 : 8,131.50 = 3,111.96 : x
  2. Step 2: Convert to fraction form
    5,418.84/8,131.50 = 3,111.96/x
  3. Step 3: Cross multiply
    5,418.84x = 8,131.50 × 3,111.96
  4. Step 4: Simplify right side
    5,418.84x = 25,304,902.74
  5. Step 5: Solve for x
    x = 25,304,902.74/5,418.84
  6. Step 6: Final answer
    x = 4,669.80

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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.