Home / 3,871.35-5,342.40-2,102.99

Finding the Fourth Proportional to 3,871.35, 5,342.40 and 2,102.99

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Solution

The fourth proportional to 3,871.35, 5,342.40 and 2,102.99 is: 2,902.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.35 : 5,342.40 = 2,102.99 : x
  2. Step 2: Convert to fraction form
    3,871.35/5,342.40 = 2,102.99/x
  3. Step 3: Cross multiply
    3,871.35x = 5,342.40 × 2,102.99
  4. Step 4: Simplify right side
    3,871.35x = 11,234,987.06
  5. Step 5: Solve for x
    x = 11,234,987.06/3,871.35
  6. Step 6: Final answer
    x = 2,902.09

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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.