Home / 26,131.20-39,218.40-12,112.80

Finding the Fourth Proportional to 26,131.20, 39,218.40 and 12,112.80

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Solution

The fourth proportional to 26,131.20, 39,218.40 and 12,112.80 is: 18,179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,131.20 : 39,218.40 = 12,112.80 : x
  2. Step 2: Convert to fraction form
    26,131.20/39,218.40 = 12,112.80/x
  3. Step 3: Cross multiply
    26,131.20x = 39,218.40 × 12,112.80
  4. Step 4: Simplify right side
    26,131.20x = 475,044,635.52
  5. Step 5: Solve for x
    x = 475,044,635.52/26,131.20
  6. Step 6: Final answer
    x = 18,179.21

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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.