Home / 3,871.55-5,342.74-2,103.15

Finding the Fourth Proportional to 3,871.55, 5,342.74 and 2,103.15

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Solution

The fourth proportional to 3,871.55, 5,342.74 and 2,103.15 is: 2,902.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.55 : 5,342.74 = 2,103.15 : x
  2. Step 2: Convert to fraction form
    3,871.55/5,342.74 = 2,103.15/x
  3. Step 3: Cross multiply
    3,871.55x = 5,342.74 × 2,103.15
  4. Step 4: Simplify right side
    3,871.55x = 11,236,583.63
  5. Step 5: Solve for x
    x = 11,236,583.63/3,871.55
  6. Step 6: Final answer
    x = 2,902.35

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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.