Home / 3,911.54-5,397.89-2,118.98

Finding the Fourth Proportional to 3,911.54, 5,397.89 and 2,118.98

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Solution

The fourth proportional to 3,911.54, 5,397.89 and 2,118.98 is: 2,924.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.54 : 5,397.89 = 2,118.98 : x
  2. Step 2: Convert to fraction form
    3,911.54/5,397.89 = 2,118.98/x
  3. Step 3: Cross multiply
    3,911.54x = 5,397.89 × 2,118.98
  4. Step 4: Simplify right side
    3,911.54x = 11,437,993.96
  5. Step 5: Solve for x
    x = 11,437,993.96/3,911.54
  6. Step 6: Final answer
    x = 2,924.17

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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.