Home / 3,611.60-5,423.80-2,638.80

Finding the Fourth Proportional to 3,611.60, 5,423.80 and 2,638.80

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Solution

The fourth proportional to 3,611.60, 5,423.80 and 2,638.80 is: 3,962.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.60 : 5,423.80 = 2,638.80 : x
  2. Step 2: Convert to fraction form
    3,611.60/5,423.80 = 2,638.80/x
  3. Step 3: Cross multiply
    3,611.60x = 5,423.80 × 2,638.80
  4. Step 4: Simplify right side
    3,611.60x = 14,312,323.44
  5. Step 5: Solve for x
    x = 14,312,323.44/3,611.60
  6. Step 6: Final answer
    x = 3,962.88

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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.