Home / 18,131.75-27,198.84-4,985.45

Finding the Fourth Proportional to 18,131.75, 27,198.84 and 4,985.45

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Solution

The fourth proportional to 18,131.75, 27,198.84 and 4,985.45 is: 7,478.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,131.75 : 27,198.84 = 4,985.45 : x
  2. Step 2: Convert to fraction form
    18,131.75/27,198.84 = 4,985.45/x
  3. Step 3: Cross multiply
    18,131.75x = 27,198.84 × 4,985.45
  4. Step 4: Simplify right side
    18,131.75x = 135,598,456.88
  5. Step 5: Solve for x
    x = 135,598,456.88/18,131.75
  6. Step 6: Final answer
    x = 7,478.51

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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.