Home / 2,130.09-2,939.49-1,185.85

Finding the Fourth Proportional to 2,130.09, 2,939.49 and 1,185.85

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Solution

The fourth proportional to 2,130.09, 2,939.49 and 1,185.85 is: 1,636.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.09 : 2,939.49 = 1,185.85 : x
  2. Step 2: Convert to fraction form
    2,130.09/2,939.49 = 1,185.85/x
  3. Step 3: Cross multiply
    2,130.09x = 2,939.49 × 1,185.85
  4. Step 4: Simplify right side
    2,130.09x = 3,485,797.89
  5. Step 5: Solve for x
    x = 3,485,797.89/2,130.09
  6. Step 6: Final answer
    x = 1,636.46

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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.