Home / 2,121.54-2,921.10-1,927.14

Finding the Fourth Proportional to 2,121.54, 2,921.10 and 1,927.14

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Solution

The fourth proportional to 2,121.54, 2,921.10 and 1,927.14 is: 2,653.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.54 : 2,921.10 = 1,927.14 : x
  2. Step 2: Convert to fraction form
    2,121.54/2,921.10 = 1,927.14/x
  3. Step 3: Cross multiply
    2,121.54x = 2,921.10 × 1,927.14
  4. Step 4: Simplify right side
    2,121.54x = 5,629,368.65
  5. Step 5: Solve for x
    x = 5,629,368.65/2,121.54
  6. Step 6: Final answer
    x = 2,653.44

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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.