Home / 2,129.88-2,939.16-1,185.64

Finding the Fourth Proportional to 2,129.88, 2,939.16 and 1,185.64

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Solution

The fourth proportional to 2,129.88, 2,939.16 and 1,185.64 is: 1,636.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.88 : 2,939.16 = 1,185.64 : x
  2. Step 2: Convert to fraction form
    2,129.88/2,939.16 = 1,185.64/x
  3. Step 3: Cross multiply
    2,129.88x = 2,939.16 × 1,185.64
  4. Step 4: Simplify right side
    2,129.88x = 3,484,785.66
  5. Step 5: Solve for x
    x = 3,484,785.66/2,129.88
  6. Step 6: Final answer
    x = 1,636.14

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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.