Home / 17,986.60-26,971.80-8,120.80

Finding the Fourth Proportional to 17,986.60, 26,971.80 and 8,120.80

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Solution

The fourth proportional to 17,986.60, 26,971.80 and 8,120.80 is: 12,177.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,986.60 : 26,971.80 = 8,120.80 : x
  2. Step 2: Convert to fraction form
    17,986.60/26,971.80 = 8,120.80/x
  3. Step 3: Cross multiply
    17,986.60x = 26,971.80 × 8,120.80
  4. Step 4: Simplify right side
    17,986.60x = 219,032,593.44
  5. Step 5: Solve for x
    x = 219,032,593.44/17,986.60
  6. Step 6: Final answer
    x = 12,177.54

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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.