Home / 3,929.34-5,422.58-2,161.05

Finding the Fourth Proportional to 3,929.34, 5,422.58 and 2,161.05

Calculator

Solution

The fourth proportional to 3,929.34, 5,422.58 and 2,161.05 is: 2,982.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.34 : 5,422.58 = 2,161.05 : x
  2. Step 2: Convert to fraction form
    3,929.34/5,422.58 = 2,161.05/x
  3. Step 3: Cross multiply
    3,929.34x = 5,422.58 × 2,161.05
  4. Step 4: Simplify right side
    3,929.34x = 11,718,466.51
  5. Step 5: Solve for x
    x = 11,718,466.51/3,929.34
  6. Step 6: Final answer
    x = 2,982.30

Related Problems

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.