Home / 3,890.80-5,369.16-2,212.18

Finding the Fourth Proportional to 3,890.80, 5,369.16 and 2,212.18

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Solution

The fourth proportional to 3,890.80, 5,369.16 and 2,212.18 is: 3,052.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.80 : 5,369.16 = 2,212.18 : x
  2. Step 2: Convert to fraction form
    3,890.80/5,369.16 = 2,212.18/x
  3. Step 3: Cross multiply
    3,890.80x = 5,369.16 × 2,212.18
  4. Step 4: Simplify right side
    3,890.80x = 11,877,548.37
  5. Step 5: Solve for x
    x = 11,877,548.37/3,890.80
  6. Step 6: Final answer
    x = 3,052.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.