Home / 20,087.85-30,131.79-8,239.44

Finding the Fourth Proportional to 20,087.85, 30,131.79 and 8,239.44

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Solution

The fourth proportional to 20,087.85, 30,131.79 and 8,239.44 is: 12,359.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.85 : 30,131.79 = 8,239.44 : x
  2. Step 2: Convert to fraction form
    20,087.85/30,131.79 = 8,239.44/x
  3. Step 3: Cross multiply
    20,087.85x = 30,131.79 × 8,239.44
  4. Step 4: Simplify right side
    20,087.85x = 248,269,075.80
  5. Step 5: Solve for x
    x = 248,269,075.80/20,087.85
  6. Step 6: Final answer
    x = 12,359.17

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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.