Home / 3,890.80-5,836.20-3,739.60

Finding the Fourth Proportional to 3,890.80, 5,836.20 and 3,739.60

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Solution

The fourth proportional to 3,890.80, 5,836.20 and 3,739.60 is: 5,609.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.80 : 5,836.20 = 3,739.60 : x
  2. Step 2: Convert to fraction form
    3,890.80/5,836.20 = 3,739.60/x
  3. Step 3: Cross multiply
    3,890.80x = 5,836.20 × 3,739.60
  4. Step 4: Simplify right side
    3,890.80x = 21,825,053.52
  5. Step 5: Solve for x
    x = 21,825,053.52/3,890.80
  6. Step 6: Final answer
    x = 5,609.40

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Similar ratio
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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.