Home / 2,121.51-3,182.45-1,254

Finding the Fourth Proportional to 2,121.51, 3,182.45 and 1,254

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Solution

The fourth proportional to 2,121.51, 3,182.45 and 1,254 is: 1,881.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.51 : 3,182.45 = 1,254 : x
  2. Step 2: Convert to fraction form
    2,121.51/3,182.45 = 1,254/x
  3. Step 3: Cross multiply
    2,121.51x = 3,182.45 × 1,254
  4. Step 4: Simplify right side
    2,121.51x = 3,990,786.03
  5. Step 5: Solve for x
    x = 3,990,786.03/2,121.51
  6. Step 6: Final answer
    x = 1,881.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.