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Finding the Fourth Proportional to 27,771.80, 41,676.90 and 19,986.20

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Solution

The fourth proportional to 27,771.80, 41,676.90 and 19,986.20 is: 29,993.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,771.80 : 41,676.90 = 19,986.20 : x
  2. Step 2: Convert to fraction form
    27,771.80/41,676.90 = 19,986.20/x
  3. Step 3: Cross multiply
    27,771.80x = 41,676.90 × 19,986.20
  4. Step 4: Simplify right side
    27,771.80x = 832,962,858.78
  5. Step 5: Solve for x
    x = 832,962,858.78/27,771.80
  6. Step 6: Final answer
    x = 29,993.12

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1.5x scale

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.