Home / 3,871.28-5,342.36-2,102.89

Finding the Fourth Proportional to 3,871.28, 5,342.36 and 2,102.89

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Solution

The fourth proportional to 3,871.28, 5,342.36 and 2,102.89 is: 2,901.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.28 : 5,342.36 = 2,102.89 : x
  2. Step 2: Convert to fraction form
    3,871.28/5,342.36 = 2,102.89/x
  3. Step 3: Cross multiply
    3,871.28x = 5,342.36 × 2,102.89
  4. Step 4: Simplify right side
    3,871.28x = 11,234,379.44
  5. Step 5: Solve for x
    x = 11,234,379.44/3,871.28
  6. Step 6: Final answer
    x = 2,901.98

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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.