Home / 3,871.09-5,342.10-2,102.74

Finding the Fourth Proportional to 3,871.09, 5,342.10 and 2,102.74

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Solution

The fourth proportional to 3,871.09, 5,342.10 and 2,102.74 is: 2,901.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.09 : 5,342.10 = 2,102.74 : x
  2. Step 2: Convert to fraction form
    3,871.09/5,342.10 = 2,102.74/x
  3. Step 3: Cross multiply
    3,871.09x = 5,342.10 × 2,102.74
  4. Step 4: Simplify right side
    3,871.09x = 11,233,047.35
  5. Step 5: Solve for x
    x = 11,233,047.35/3,871.09
  6. Step 6: Final answer
    x = 2,901.78

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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.