Home / 5,128.11-7,682.49-2,930.22

Finding the Fourth Proportional to 5,128.11, 7,682.49 and 2,930.22

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Solution

The fourth proportional to 5,128.11, 7,682.49 and 2,930.22 is: 4,389.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.11 : 7,682.49 = 2,930.22 : x
  2. Step 2: Convert to fraction form
    5,128.11/7,682.49 = 2,930.22/x
  3. Step 3: Cross multiply
    5,128.11x = 7,682.49 × 2,930.22
  4. Step 4: Simplify right side
    5,128.11x = 22,511,385.85
  5. Step 5: Solve for x
    x = 22,511,385.85/5,128.11
  6. Step 6: Final answer
    x = 4,389.80

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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.