Home / 3,871.49-5,342.77-2,103.21

Finding the Fourth Proportional to 3,871.49, 5,342.77 and 2,103.21

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Solution

The fourth proportional to 3,871.49, 5,342.77 and 2,103.21 is: 2,902.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.49 : 5,342.77 = 2,103.21 : x
  2. Step 2: Convert to fraction form
    3,871.49/5,342.77 = 2,103.21/x
  3. Step 3: Cross multiply
    3,871.49x = 5,342.77 × 2,103.21
  4. Step 4: Simplify right side
    3,871.49x = 11,236,967.29
  5. Step 5: Solve for x
    x = 11,236,967.29/3,871.49
  6. Step 6: Final answer
    x = 2,902.49

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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.