Home / 3,981.28-5,971.92-1,384.20

Finding the Fourth Proportional to 3,981.28, 5,971.92 and 1,384.20

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Solution

The fourth proportional to 3,981.28, 5,971.92 and 1,384.20 is: 2,076.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.28 : 5,971.92 = 1,384.20 : x
  2. Step 2: Convert to fraction form
    3,981.28/5,971.92 = 1,384.20/x
  3. Step 3: Cross multiply
    3,981.28x = 5,971.92 × 1,384.20
  4. Step 4: Simplify right side
    3,981.28x = 8,266,331.66
  5. Step 5: Solve for x
    x = 8,266,331.66/3,981.28
  6. Step 6: Final answer
    x = 2,076.30

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1.5x scale

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.