Home / 18,689.44-28,015.26-12,119.80

Finding the Fourth Proportional to 18,689.44, 28,015.26 and 12,119.80

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Solution

The fourth proportional to 18,689.44, 28,015.26 and 12,119.80 is: 18,167.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.44 : 28,015.26 = 12,119.80 : x
  2. Step 2: Convert to fraction form
    18,689.44/28,015.26 = 12,119.80/x
  3. Step 3: Cross multiply
    18,689.44x = 28,015.26 × 12,119.80
  4. Step 4: Simplify right side
    18,689.44x = 339,539,348.15
  5. Step 5: Solve for x
    x = 339,539,348.15/18,689.44
  6. Step 6: Final answer
    x = 18,167.44

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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.