Home / 3,890.45-5,368.64-2,211.83

Finding the Fourth Proportional to 3,890.45, 5,368.64 and 2,211.83

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Solution

The fourth proportional to 3,890.45, 5,368.64 and 2,211.83 is: 3,052.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.45 : 5,368.64 = 2,211.83 : x
  2. Step 2: Convert to fraction form
    3,890.45/5,368.64 = 2,211.83/x
  3. Step 3: Cross multiply
    3,890.45x = 5,368.64 × 2,211.83
  4. Step 4: Simplify right side
    3,890.45x = 11,874,519.01
  5. Step 5: Solve for x
    x = 11,874,519.01/3,890.45
  6. Step 6: Final answer
    x = 3,052.22

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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.