Home / 3,914.04-5,401.40-2,121.55

Finding the Fourth Proportional to 3,914.04, 5,401.40 and 2,121.55

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Solution

The fourth proportional to 3,914.04, 5,401.40 and 2,121.55 is: 2,927.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,914.04 : 5,401.40 = 2,121.55 : x
  2. Step 2: Convert to fraction form
    3,914.04/5,401.40 = 2,121.55/x
  3. Step 3: Cross multiply
    3,914.04x = 5,401.40 × 2,121.55
  4. Step 4: Simplify right side
    3,914.04x = 11,459,340.17
  5. Step 5: Solve for x
    x = 11,459,340.17/3,914.04
  6. Step 6: Final answer
    x = 2,927.75

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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.