Home / 28,129.35-42,147.27-19,791.87

Finding the Fourth Proportional to 28,129.35, 42,147.27 and 19,791.87

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Solution

The fourth proportional to 28,129.35, 42,147.27 and 19,791.87 is: 29,654.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.35 : 42,147.27 = 19,791.87 : x
  2. Step 2: Convert to fraction form
    28,129.35/42,147.27 = 19,791.87/x
  3. Step 3: Cross multiply
    28,129.35x = 42,147.27 × 19,791.87
  4. Step 4: Simplify right side
    28,129.35x = 834,173,288.69
  5. Step 5: Solve for x
    x = 834,173,288.69/28,129.35
  6. Step 6: Final answer
    x = 29,654.91

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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.