Home / 5,418.84-8,128.53-1,721.35

Finding the Fourth Proportional to 5,418.84, 8,128.53 and 1,721.35

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Solution

The fourth proportional to 5,418.84, 8,128.53 and 1,721.35 is: 2,582.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.84 : 8,128.53 = 1,721.35 : x
  2. Step 2: Convert to fraction form
    5,418.84/8,128.53 = 1,721.35/x
  3. Step 3: Cross multiply
    5,418.84x = 8,128.53 × 1,721.35
  4. Step 4: Simplify right side
    5,418.84x = 13,992,045.12
  5. Step 5: Solve for x
    x = 13,992,045.12/5,418.84
  6. Step 6: Final answer
    x = 2,582.11

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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.