Home / 3,912.88-5,401.38-2,420.32

Finding the Fourth Proportional to 3,912.88, 5,401.38 and 2,420.32

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Solution

The fourth proportional to 3,912.88, 5,401.38 and 2,420.32 is: 3,341.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.88 : 5,401.38 = 2,420.32 : x
  2. Step 2: Convert to fraction form
    3,912.88/5,401.38 = 2,420.32/x
  3. Step 3: Cross multiply
    3,912.88x = 5,401.38 × 2,420.32
  4. Step 4: Simplify right side
    3,912.88x = 13,073,068.04
  5. Step 5: Solve for x
    x = 13,073,068.04/3,912.88
  6. Step 6: Final answer
    x = 3,341.03

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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.