Home / 2,129.93-2,939.25-1,185.68

Finding the Fourth Proportional to 2,129.93, 2,939.25 and 1,185.68

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Solution

The fourth proportional to 2,129.93, 2,939.25 and 1,185.68 is: 1,636.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.93 : 2,939.25 = 1,185.68 : x
  2. Step 2: Convert to fraction form
    2,129.93/2,939.25 = 1,185.68/x
  3. Step 3: Cross multiply
    2,129.93x = 2,939.25 × 1,185.68
  4. Step 4: Simplify right side
    2,129.93x = 3,485,009.94
  5. Step 5: Solve for x
    x = 3,485,009.94/2,129.93
  6. Step 6: Final answer
    x = 1,636.21

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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.