Home / 3,889.95-5,368.22-2,121.67

Finding the Fourth Proportional to 3,889.95, 5,368.22 and 2,121.67

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Solution

The fourth proportional to 3,889.95, 5,368.22 and 2,121.67 is: 2,927.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.95 : 5,368.22 = 2,121.67 : x
  2. Step 2: Convert to fraction form
    3,889.95/5,368.22 = 2,121.67/x
  3. Step 3: Cross multiply
    3,889.95x = 5,368.22 × 2,121.67
  4. Step 4: Simplify right side
    3,889.95x = 11,389,591.33
  5. Step 5: Solve for x
    x = 11,389,591.33/3,889.95
  6. Step 6: Final answer
    x = 2,927.95

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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.