Home / 12,121.36-18,182.80-4,223.56

Finding the Fourth Proportional to 12,121.36, 18,182.80 and 4,223.56

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Solution

The fourth proportional to 12,121.36, 18,182.80 and 4,223.56 is: 6,335.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.36 : 18,182.80 = 4,223.56 : x
  2. Step 2: Convert to fraction form
    12,121.36/18,182.80 = 4,223.56/x
  3. Step 3: Cross multiply
    12,121.36x = 18,182.80 × 4,223.56
  4. Step 4: Simplify right side
    12,121.36x = 76,796,075.85
  5. Step 5: Solve for x
    x = 76,796,075.85/12,121.36
  6. Step 6: Final answer
    x = 6,335.60

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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.