Home / 3,871.80-5,343.08-2,103.39

Finding the Fourth Proportional to 3,871.80, 5,343.08 and 2,103.39

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Solution

The fourth proportional to 3,871.80, 5,343.08 and 2,103.39 is: 2,902.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.80 : 5,343.08 = 2,103.39 : x
  2. Step 2: Convert to fraction form
    3,871.80/5,343.08 = 2,103.39/x
  3. Step 3: Cross multiply
    3,871.80x = 5,343.08 × 2,103.39
  4. Step 4: Simplify right side
    3,871.80x = 11,238,570.52
  5. Step 5: Solve for x
    x = 11,238,570.52/3,871.80
  6. Step 6: Final answer
    x = 2,902.67

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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.