Home / 3,871.23-5,342.34-2,102.85

Finding the Fourth Proportional to 3,871.23, 5,342.34 and 2,102.85

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Solution

The fourth proportional to 3,871.23, 5,342.34 and 2,102.85 is: 2,901.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.23 : 5,342.34 = 2,102.85 : x
  2. Step 2: Convert to fraction form
    3,871.23/5,342.34 = 2,102.85/x
  3. Step 3: Cross multiply
    3,871.23x = 5,342.34 × 2,102.85
  4. Step 4: Simplify right side
    3,871.23x = 11,234,139.67
  5. Step 5: Solve for x
    x = 11,234,139.67/3,871.23
  6. Step 6: Final answer
    x = 2,901.96

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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.