Home / 3,889.98-5,368.21-2,121.59

Finding the Fourth Proportional to 3,889.98, 5,368.21 and 2,121.59

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Solution

The fourth proportional to 3,889.98, 5,368.21 and 2,121.59 is: 2,927.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.98 : 5,368.21 = 2,121.59 : x
  2. Step 2: Convert to fraction form
    3,889.98/5,368.21 = 2,121.59/x
  3. Step 3: Cross multiply
    3,889.98x = 5,368.21 × 2,121.59
  4. Step 4: Simplify right side
    3,889.98x = 11,389,148.77
  5. Step 5: Solve for x
    x = 11,389,148.77/3,889.98
  6. Step 6: Final answer
    x = 2,927.82

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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.