Home / 3,890.57-5,368.79-2,122.07

Finding the Fourth Proportional to 3,890.57, 5,368.79 and 2,122.07

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Solution

The fourth proportional to 3,890.57, 5,368.79 and 2,122.07 is: 2,928.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.57 : 5,368.79 = 2,122.07 : x
  2. Step 2: Convert to fraction form
    3,890.57/5,368.79 = 2,122.07/x
  3. Step 3: Cross multiply
    3,890.57x = 5,368.79 × 2,122.07
  4. Step 4: Simplify right side
    3,890.57x = 11,392,926.66
  5. Step 5: Solve for x
    x = 11,392,926.66/3,890.57
  6. Step 6: Final answer
    x = 2,928.35

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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.