Home / 4,343.80-6,515.76-3,121.60

Finding the Fourth Proportional to 4,343.80, 6,515.76 and 3,121.60

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Solution

The fourth proportional to 4,343.80, 6,515.76 and 3,121.60 is: 4,682.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,343.80 : 6,515.76 = 3,121.60 : x
  2. Step 2: Convert to fraction form
    4,343.80/6,515.76 = 3,121.60/x
  3. Step 3: Cross multiply
    4,343.80x = 6,515.76 × 3,121.60
  4. Step 4: Simplify right side
    4,343.80x = 20,339,596.42
  5. Step 5: Solve for x
    x = 20,339,596.42/4,343.80
  6. Step 6: Final answer
    x = 4,682.44

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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.