Home / 2,104.12-3,149.70-1,127.80

Finding the Fourth Proportional to 2,104.12, 3,149.70 and 1,127.80

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Solution

The fourth proportional to 2,104.12, 3,149.70 and 1,127.80 is: 1,688.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.12 : 3,149.70 = 1,127.80 : x
  2. Step 2: Convert to fraction form
    2,104.12/3,149.70 = 1,127.80/x
  3. Step 3: Cross multiply
    2,104.12x = 3,149.70 × 1,127.80
  4. Step 4: Simplify right side
    2,104.12x = 3,552,231.66
  5. Step 5: Solve for x
    x = 3,552,231.66/2,104.12
  6. Step 6: Final answer
    x = 1,688.23

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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.