Home / 3,889.93-5,368.05-2,121.53

Finding the Fourth Proportional to 3,889.93, 5,368.05 and 2,121.53

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Solution

The fourth proportional to 3,889.93, 5,368.05 and 2,121.53 is: 2,927.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.93 : 5,368.05 = 2,121.53 : x
  2. Step 2: Convert to fraction form
    3,889.93/5,368.05 = 2,121.53/x
  3. Step 3: Cross multiply
    3,889.93x = 5,368.05 × 2,121.53
  4. Step 4: Simplify right side
    3,889.93x = 11,388,481.93
  5. Step 5: Solve for x
    x = 11,388,481.93/3,889.93
  6. Step 6: Final answer
    x = 2,927.68

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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.