Home / 12,241.90-18,351.21-3,916.55

Finding the Fourth Proportional to 12,241.90, 18,351.21 and 3,916.55

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Solution

The fourth proportional to 12,241.90, 18,351.21 and 3,916.55 is: 5,871.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,241.90 : 18,351.21 = 3,916.55 : x
  2. Step 2: Convert to fraction form
    12,241.90/18,351.21 = 3,916.55/x
  3. Step 3: Cross multiply
    12,241.90x = 18,351.21 × 3,916.55
  4. Step 4: Simplify right side
    12,241.90x = 71,873,470.06
  5. Step 5: Solve for x
    x = 71,873,470.06/12,241.90
  6. Step 6: Final answer
    x = 5,871.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.