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Finding the Fourth Proportional to 51,791.55, 77,676.06 and 18,513.91

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Solution

The fourth proportional to 51,791.55, 77,676.06 and 18,513.91 is: 27,766.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,791.55 : 77,676.06 = 18,513.91 : x
  2. Step 2: Convert to fraction form
    51,791.55/77,676.06 = 18,513.91/x
  3. Step 3: Cross multiply
    51,791.55x = 77,676.06 × 18,513.91
  4. Step 4: Simplify right side
    51,791.55x = 1,438,087,583.99
  5. Step 5: Solve for x
    x = 1,438,087,583.99/51,791.55
  6. Step 6: Final answer
    x = 27,766.84

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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.