Home / 2,721.40-4,083.18-1,421.08

Finding the Fourth Proportional to 2,721.40, 4,083.18 and 1,421.08

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Solution

The fourth proportional to 2,721.40, 4,083.18 and 1,421.08 is: 2,132.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.40 : 4,083.18 = 1,421.08 : x
  2. Step 2: Convert to fraction form
    2,721.40/4,083.18 = 1,421.08/x
  3. Step 3: Cross multiply
    2,721.40x = 4,083.18 × 1,421.08
  4. Step 4: Simplify right side
    2,721.40x = 5,802,525.43
  5. Step 5: Solve for x
    x = 5,802,525.43/2,721.40
  6. Step 6: Final answer
    x = 2,132.18

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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.