Home / 5,422.78-8,131.33-1,912.11

Finding the Fourth Proportional to 5,422.78, 8,131.33 and 1,912.11

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Solution

The fourth proportional to 5,422.78, 8,131.33 and 1,912.11 is: 2,867.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.78 : 8,131.33 = 1,912.11 : x
  2. Step 2: Convert to fraction form
    5,422.78/8,131.33 = 1,912.11/x
  3. Step 3: Cross multiply
    5,422.78x = 8,131.33 × 1,912.11
  4. Step 4: Simplify right side
    5,422.78x = 15,547,997.41
  5. Step 5: Solve for x
    x = 15,547,997.41/5,422.78
  6. Step 6: Final answer
    x = 2,867.16

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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.