Home / 3,905.80-5,397.78-2,914.36

Finding the Fourth Proportional to 3,905.80, 5,397.78 and 2,914.36

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Solution

The fourth proportional to 3,905.80, 5,397.78 and 2,914.36 is: 4,027.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.80 : 5,397.78 = 2,914.36 : x
  2. Step 2: Convert to fraction form
    3,905.80/5,397.78 = 2,914.36/x
  3. Step 3: Cross multiply
    3,905.80x = 5,397.78 × 2,914.36
  4. Step 4: Simplify right side
    3,905.80x = 15,731,074.12
  5. Step 5: Solve for x
    x = 15,731,074.12/3,905.80
  6. Step 6: Final answer
    x = 4,027.62

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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.