Home / 3,868.81-5,338.98-2,100.43

Finding the Fourth Proportional to 3,868.81, 5,338.98 and 2,100.43

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Solution

The fourth proportional to 3,868.81, 5,338.98 and 2,100.43 is: 2,898.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.81 : 5,338.98 = 2,100.43 : x
  2. Step 2: Convert to fraction form
    3,868.81/5,338.98 = 2,100.43/x
  3. Step 3: Cross multiply
    3,868.81x = 5,338.98 × 2,100.43
  4. Step 4: Simplify right side
    3,868.81x = 11,214,153.76
  5. Step 5: Solve for x
    x = 11,214,153.76/3,868.81
  6. Step 6: Final answer
    x = 2,898.61

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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.