Home / 3,911.90-5,398.41-2,143.50

Finding the Fourth Proportional to 3,911.90, 5,398.41 and 2,143.50

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Solution

The fourth proportional to 3,911.90, 5,398.41 and 2,143.50 is: 2,958.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.90 : 5,398.41 = 2,143.50 : x
  2. Step 2: Convert to fraction form
    3,911.90/5,398.41 = 2,143.50/x
  3. Step 3: Cross multiply
    3,911.90x = 5,398.41 × 2,143.50
  4. Step 4: Simplify right side
    3,911.90x = 11,571,479.63
  5. Step 5: Solve for x
    x = 11,571,479.63/3,911.90
  6. Step 6: Final answer
    x = 2,958.02

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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.