Home / 3,120.10-4,681.65-2,080.60

Finding the Fourth Proportional to 3,120.10, 4,681.65 and 2,080.60

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Solution

The fourth proportional to 3,120.10, 4,681.65 and 2,080.60 is: 3,121.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.10 : 4,681.65 = 2,080.60 : x
  2. Step 2: Convert to fraction form
    3,120.10/4,681.65 = 2,080.60/x
  3. Step 3: Cross multiply
    3,120.10x = 4,681.65 × 2,080.60
  4. Step 4: Simplify right side
    3,120.10x = 9,740,640.99
  5. Step 5: Solve for x
    x = 9,740,640.99/3,120.10
  6. Step 6: Final answer
    x = 3,121.90

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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.