Home / 5,231.40-7,839.81-3,931.35

Finding the Fourth Proportional to 5,231.40, 7,839.81 and 3,931.35

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Solution

The fourth proportional to 5,231.40, 7,839.81 and 3,931.35 is: 5,891.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,231.40 : 7,839.81 = 3,931.35 : x
  2. Step 2: Convert to fraction form
    5,231.40/7,839.81 = 3,931.35/x
  3. Step 3: Cross multiply
    5,231.40x = 7,839.81 × 3,931.35
  4. Step 4: Simplify right side
    5,231.40x = 30,821,037.04
  5. Step 5: Solve for x
    x = 30,821,037.04/5,231.40
  6. Step 6: Final answer
    x = 5,891.55

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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.