Home / 2,121.15-2,927.55-1,236.95

Finding the Fourth Proportional to 2,121.15, 2,927.55 and 1,236.95

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Solution

The fourth proportional to 2,121.15, 2,927.55 and 1,236.95 is: 1,707.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.15 : 2,927.55 = 1,236.95 : x
  2. Step 2: Convert to fraction form
    2,121.15/2,927.55 = 1,236.95/x
  3. Step 3: Cross multiply
    2,121.15x = 2,927.55 × 1,236.95
  4. Step 4: Simplify right side
    2,121.15x = 3,621,218.33
  5. Step 5: Solve for x
    x = 3,621,218.33/2,121.15
  6. Step 6: Final answer
    x = 1,707.20

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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.