Home / 5,418.72-8,129.36-1,956

Finding the Fourth Proportional to 5,418.72, 8,129.36 and 1,956

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Solution

The fourth proportional to 5,418.72, 8,129.36 and 1,956 is: 2,934.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.72 : 8,129.36 = 1,956 : x
  2. Step 2: Convert to fraction form
    5,418.72/8,129.36 = 1,956/x
  3. Step 3: Cross multiply
    5,418.72x = 8,129.36 × 1,956
  4. Step 4: Simplify right side
    5,418.72x = 15,901,028.16
  5. Step 5: Solve for x
    x = 15,901,028.16/5,418.72
  6. Step 6: Final answer
    x = 2,934.46

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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.