Home / 20,087.80-30,131.70-18,629.80

Finding the Fourth Proportional to 20,087.80, 30,131.70 and 18,629.80

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Solution

The fourth proportional to 20,087.80, 30,131.70 and 18,629.80 is: 27,944.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.80 : 30,131.70 = 18,629.80 : x
  2. Step 2: Convert to fraction form
    20,087.80/30,131.70 = 18,629.80/x
  3. Step 3: Cross multiply
    20,087.80x = 30,131.70 × 18,629.80
  4. Step 4: Simplify right side
    20,087.80x = 561,347,544.66
  5. Step 5: Solve for x
    x = 561,347,544.66/20,087.80
  6. Step 6: Final answer
    x = 27,944.70

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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.