Home / 3,981.92-5,971.56-1,384.28

Finding the Fourth Proportional to 3,981.92, 5,971.56 and 1,384.28

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Solution

The fourth proportional to 3,981.92, 5,971.56 and 1,384.28 is: 2,075.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.92 : 5,971.56 = 1,384.28 : x
  2. Step 2: Convert to fraction form
    3,981.92/5,971.56 = 1,384.28/x
  3. Step 3: Cross multiply
    3,981.92x = 5,971.56 × 1,384.28
  4. Step 4: Simplify right side
    3,981.92x = 8,266,311.08
  5. Step 5: Solve for x
    x = 8,266,311.08/3,981.92
  6. Step 6: Final answer
    x = 2,075.96

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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.