Home / 5,278.37-7,917.75-1,991.39

Finding the Fourth Proportional to 5,278.37, 7,917.75 and 1,991.39

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Solution

The fourth proportional to 5,278.37, 7,917.75 and 1,991.39 is: 2,987.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.37 : 7,917.75 = 1,991.39 : x
  2. Step 2: Convert to fraction form
    5,278.37/7,917.75 = 1,991.39/x
  3. Step 3: Cross multiply
    5,278.37x = 7,917.75 × 1,991.39
  4. Step 4: Simplify right side
    5,278.37x = 15,767,288.58
  5. Step 5: Solve for x
    x = 15,767,288.58/5,278.37
  6. Step 6: Final answer
    x = 2,987.15

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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.