Home / 5,279.83-7,286.09-2,889.74

Finding the Fourth Proportional to 5,279.83, 7,286.09 and 2,889.74

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Solution

The fourth proportional to 5,279.83, 7,286.09 and 2,889.74 is: 3,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.83 : 7,286.09 = 2,889.74 : x
  2. Step 2: Convert to fraction form
    5,279.83/7,286.09 = 2,889.74/x
  3. Step 3: Cross multiply
    5,279.83x = 7,286.09 × 2,889.74
  4. Step 4: Simplify right side
    5,279.83x = 21,054,909.48
  5. Step 5: Solve for x
    x = 21,054,909.48/5,279.83
  6. Step 6: Final answer
    x = 3,987.80

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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.