Home / 3,871.50-5,343.39-2,215.50

Finding the Fourth Proportional to 3,871.50, 5,343.39 and 2,215.50

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Solution

The fourth proportional to 3,871.50, 5,343.39 and 2,215.50 is: 3,057.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.50 : 5,343.39 = 2,215.50 : x
  2. Step 2: Convert to fraction form
    3,871.50/5,343.39 = 2,215.50/x
  3. Step 3: Cross multiply
    3,871.50x = 5,343.39 × 2,215.50
  4. Step 4: Simplify right side
    3,871.50x = 11,838,280.55
  5. Step 5: Solve for x
    x = 11,838,280.55/3,871.50
  6. Step 6: Final answer
    x = 3,057.80

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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.