Home / 3,861.80-5,329.86-3,271.40

Finding the Fourth Proportional to 3,861.80, 5,329.86 and 3,271.40

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Solution

The fourth proportional to 3,861.80, 5,329.86 and 3,271.40 is: 4,515.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.80 : 5,329.86 = 3,271.40 : x
  2. Step 2: Convert to fraction form
    3,861.80/5,329.86 = 3,271.40/x
  3. Step 3: Cross multiply
    3,861.80x = 5,329.86 × 3,271.40
  4. Step 4: Simplify right side
    3,861.80x = 17,436,104.00
  5. Step 5: Solve for x
    x = 17,436,104.00/3,861.80
  6. Step 6: Final answer
    x = 4,515.02

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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.