Home / 3,891.49-5,369.97-2,123.06

Finding the Fourth Proportional to 3,891.49, 5,369.97 and 2,123.06

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Solution

The fourth proportional to 3,891.49, 5,369.97 and 2,123.06 is: 2,929.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.49 : 5,369.97 = 2,123.06 : x
  2. Step 2: Convert to fraction form
    3,891.49/5,369.97 = 2,123.06/x
  3. Step 3: Cross multiply
    3,891.49x = 5,369.97 × 2,123.06
  4. Step 4: Simplify right side
    3,891.49x = 11,400,741.66
  5. Step 5: Solve for x
    x = 11,400,741.66/3,891.49
  6. Step 6: Final answer
    x = 2,929.66

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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.