Home / 5,015-6,918.72-2,889.80

Finding the Fourth Proportional to 5,015, 6,918.72 and 2,889.80

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Solution

The fourth proportional to 5,015, 6,918.72 and 2,889.80 is: 3,986.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015 : 6,918.72 = 2,889.80 : x
  2. Step 2: Convert to fraction form
    5,015/6,918.72 = 2,889.80/x
  3. Step 3: Cross multiply
    5,015x = 6,918.72 × 2,889.80
  4. Step 4: Simplify right side
    5,015x = 19,993,717.06
  5. Step 5: Solve for x
    x = 19,993,717.06/5,015
  6. Step 6: Final answer
    x = 3,986.78

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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.