Home / 3,870.75-5,336.64-3,161.85

Finding the Fourth Proportional to 3,870.75, 5,336.64 and 3,161.85

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Solution

The fourth proportional to 3,870.75, 5,336.64 and 3,161.85 is: 4,359.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.75 : 5,336.64 = 3,161.85 : x
  2. Step 2: Convert to fraction form
    3,870.75/5,336.64 = 3,161.85/x
  3. Step 3: Cross multiply
    3,870.75x = 5,336.64 × 3,161.85
  4. Step 4: Simplify right side
    3,870.75x = 16,873,655.18
  5. Step 5: Solve for x
    x = 16,873,655.18/3,870.75
  6. Step 6: Final answer
    x = 4,359.27

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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.