Home / 5,138.81-7,708.22-3,290.79

Finding the Fourth Proportional to 5,138.81, 7,708.22 and 3,290.79

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Solution

The fourth proportional to 5,138.81, 7,708.22 and 3,290.79 is: 4,936.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.81 : 7,708.22 = 3,290.79 : x
  2. Step 2: Convert to fraction form
    5,138.81/7,708.22 = 3,290.79/x
  3. Step 3: Cross multiply
    5,138.81x = 7,708.22 × 3,290.79
  4. Step 4: Simplify right side
    5,138.81x = 25,366,116.84
  5. Step 5: Solve for x
    x = 25,366,116.84/5,138.81
  6. Step 6: Final answer
    x = 4,936.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.