Home / 3,889.73-5,367.86-2,121.34

Finding the Fourth Proportional to 3,889.73, 5,367.86 and 2,121.34

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Solution

The fourth proportional to 3,889.73, 5,367.86 and 2,121.34 is: 2,927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.73 : 5,367.86 = 2,121.34 : x
  2. Step 2: Convert to fraction form
    3,889.73/5,367.86 = 2,121.34/x
  3. Step 3: Cross multiply
    3,889.73x = 5,367.86 × 2,121.34
  4. Step 4: Simplify right side
    3,889.73x = 11,387,056.13
  5. Step 5: Solve for x
    x = 11,387,056.13/3,889.73
  6. Step 6: Final answer
    x = 2,927.47

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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.