Home / 3,889.84-5,367.96-2,121.46

Finding the Fourth Proportional to 3,889.84, 5,367.96 and 2,121.46

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Solution

The fourth proportional to 3,889.84, 5,367.96 and 2,121.46 is: 2,927.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.84 : 5,367.96 = 2,121.46 : x
  2. Step 2: Convert to fraction form
    3,889.84/5,367.96 = 2,121.46/x
  3. Step 3: Cross multiply
    3,889.84x = 5,367.96 × 2,121.46
  4. Step 4: Simplify right side
    3,889.84x = 11,387,912.42
  5. Step 5: Solve for x
    x = 11,387,912.42/3,889.84
  6. Step 6: Final answer
    x = 2,927.60

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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.