Home / 5,279.87-7,286.33-2,889.89

Finding the Fourth Proportional to 5,279.87, 7,286.33 and 2,889.89

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Solution

The fourth proportional to 5,279.87, 7,286.33 and 2,889.89 is: 3,988.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.87 : 7,286.33 = 2,889.89 : x
  2. Step 2: Convert to fraction form
    5,279.87/7,286.33 = 2,889.89/x
  3. Step 3: Cross multiply
    5,279.87x = 7,286.33 × 2,889.89
  4. Step 4: Simplify right side
    5,279.87x = 21,056,641.32
  5. Step 5: Solve for x
    x = 21,056,641.32/5,279.87
  6. Step 6: Final answer
    x = 3,988.10

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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.