Home / 2,121.19-2,926.87-1,236.80

Finding the Fourth Proportional to 2,121.19, 2,926.87 and 1,236.80

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Solution

The fourth proportional to 2,121.19, 2,926.87 and 1,236.80 is: 1,706.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.19 : 2,926.87 = 1,236.80 : x
  2. Step 2: Convert to fraction form
    2,121.19/2,926.87 = 1,236.80/x
  3. Step 3: Cross multiply
    2,121.19x = 2,926.87 × 1,236.80
  4. Step 4: Simplify right side
    2,121.19x = 3,619,957.04
  5. Step 5: Solve for x
    x = 3,619,957.04/2,121.19
  6. Step 6: Final answer
    x = 1,706.57

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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.