Home / 18,938.75-28,408.19-5,791.10

Finding the Fourth Proportional to 18,938.75, 28,408.19 and 5,791.10

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Solution

The fourth proportional to 18,938.75, 28,408.19 and 5,791.10 is: 8,686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,938.75 : 28,408.19 = 5,791.10 : x
  2. Step 2: Convert to fraction form
    18,938.75/28,408.19 = 5,791.10/x
  3. Step 3: Cross multiply
    18,938.75x = 28,408.19 × 5,791.10
  4. Step 4: Simplify right side
    18,938.75x = 164,514,498.11
  5. Step 5: Solve for x
    x = 164,514,498.11/18,938.75
  6. Step 6: Final answer
    x = 8,686.66

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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.