Home / 3,795.80-5,238-2,117.21

Finding the Fourth Proportional to 3,795.80, 5,238 and 2,117.21

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Solution

The fourth proportional to 3,795.80, 5,238 and 2,117.21 is: 2,921.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,795.80 : 5,238 = 2,117.21 : x
  2. Step 2: Convert to fraction form
    3,795.80/5,238 = 2,117.21/x
  3. Step 3: Cross multiply
    3,795.80x = 5,238 × 2,117.21
  4. Step 4: Simplify right side
    3,795.80x = 11,089,919.79
  5. Step 5: Solve for x
    x = 11,089,919.79/3,795.80
  6. Step 6: Final answer
    x = 2,921.63

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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.