Home / 2,129.93-2,939.34-1,185.74

Finding the Fourth Proportional to 2,129.93, 2,939.34 and 1,185.74

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Solution

The fourth proportional to 2,129.93, 2,939.34 and 1,185.74 is: 1,636.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.93 : 2,939.34 = 1,185.74 : x
  2. Step 2: Convert to fraction form
    2,129.93/2,939.34 = 1,185.74/x
  3. Step 3: Cross multiply
    2,129.93x = 2,939.34 × 1,185.74
  4. Step 4: Simplify right side
    2,129.93x = 3,485,278.31
  5. Step 5: Solve for x
    x = 3,485,278.31/2,129.93
  6. Step 6: Final answer
    x = 1,636.34

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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.