Home / 3,981.40-5,971.26-1,515.36

Finding the Fourth Proportional to 3,981.40, 5,971.26 and 1,515.36

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Solution

The fourth proportional to 3,981.40, 5,971.26 and 1,515.36 is: 2,272.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.40 : 5,971.26 = 1,515.36 : x
  2. Step 2: Convert to fraction form
    3,981.40/5,971.26 = 1,515.36/x
  3. Step 3: Cross multiply
    3,981.40x = 5,971.26 × 1,515.36
  4. Step 4: Simplify right side
    3,981.40x = 9,048,608.55
  5. Step 5: Solve for x
    x = 9,048,608.55/3,981.40
  6. Step 6: Final answer
    x = 2,272.72

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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.