Home / 5,279.80-7,286.01-2,889.76

Finding the Fourth Proportional to 5,279.80, 7,286.01 and 2,889.76

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Solution

The fourth proportional to 5,279.80, 7,286.01 and 2,889.76 is: 3,987.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.80 : 7,286.01 = 2,889.76 : x
  2. Step 2: Convert to fraction form
    5,279.80/7,286.01 = 2,889.76/x
  3. Step 3: Cross multiply
    5,279.80x = 7,286.01 × 2,889.76
  4. Step 4: Simplify right side
    5,279.80x = 21,054,820.26
  5. Step 5: Solve for x
    x = 21,054,820.26/5,279.80
  6. Step 6: Final answer
    x = 3,987.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.