Home / 3,156.05-4,728.84-1,919.72

Finding the Fourth Proportional to 3,156.05, 4,728.84 and 1,919.72

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Solution

The fourth proportional to 3,156.05, 4,728.84 and 1,919.72 is: 2,876.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.05 : 4,728.84 = 1,919.72 : x
  2. Step 2: Convert to fraction form
    3,156.05/4,728.84 = 1,919.72/x
  3. Step 3: Cross multiply
    3,156.05x = 4,728.84 × 1,919.72
  4. Step 4: Simplify right side
    3,156.05x = 9,078,015.48
  5. Step 5: Solve for x
    x = 9,078,015.48/3,156.05
  6. Step 6: Final answer
    x = 2,876.39

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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.