Home / 5,279.25-7,918.56-1,991.91

Finding the Fourth Proportional to 5,279.25, 7,918.56 and 1,991.91

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Solution

The fourth proportional to 5,279.25, 7,918.56 and 1,991.91 is: 2,987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.25 : 7,918.56 = 1,991.91 : x
  2. Step 2: Convert to fraction form
    5,279.25/7,918.56 = 1,991.91/x
  3. Step 3: Cross multiply
    5,279.25x = 7,918.56 × 1,991.91
  4. Step 4: Simplify right side
    5,279.25x = 15,773,058.85
  5. Step 5: Solve for x
    x = 15,773,058.85/5,279.25
  6. Step 6: Final answer
    x = 2,987.75

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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.