Home / 5,279.50-7,920.73-2,161.75

Finding the Fourth Proportional to 5,279.50, 7,920.73 and 2,161.75

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Solution

The fourth proportional to 5,279.50, 7,920.73 and 2,161.75 is: 3,243.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.50 : 7,920.73 = 2,161.75 : x
  2. Step 2: Convert to fraction form
    5,279.50/7,920.73 = 2,161.75/x
  3. Step 3: Cross multiply
    5,279.50x = 7,920.73 × 2,161.75
  4. Step 4: Simplify right side
    5,279.50x = 17,122,638.08
  5. Step 5: Solve for x
    x = 17,122,638.08/5,279.50
  6. Step 6: Final answer
    x = 3,243.23

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1.5x scale

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.