Home / 5,145.80-7,725.90-3,201.80

Finding the Fourth Proportional to 5,145.80, 7,725.90 and 3,201.80

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Solution

The fourth proportional to 5,145.80, 7,725.90 and 3,201.80 is: 4,807.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.80 : 7,725.90 = 3,201.80 : x
  2. Step 2: Convert to fraction form
    5,145.80/7,725.90 = 3,201.80/x
  3. Step 3: Cross multiply
    5,145.80x = 7,725.90 × 3,201.80
  4. Step 4: Simplify right side
    5,145.80x = 24,736,786.62
  5. Step 5: Solve for x
    x = 24,736,786.62/5,145.80
  6. Step 6: Final answer
    x = 4,807.18

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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.