Home / 3,889.51-5,367.43-2,121.11

Finding the Fourth Proportional to 3,889.51, 5,367.43 and 2,121.11

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Solution

The fourth proportional to 3,889.51, 5,367.43 and 2,121.11 is: 2,927.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.51 : 5,367.43 = 2,121.11 : x
  2. Step 2: Convert to fraction form
    3,889.51/5,367.43 = 2,121.11/x
  3. Step 3: Cross multiply
    3,889.51x = 5,367.43 × 2,121.11
  4. Step 4: Simplify right side
    3,889.51x = 11,384,909.45
  5. Step 5: Solve for x
    x = 11,384,909.45/3,889.51
  6. Step 6: Final answer
    x = 2,927.08

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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.