Home / 12,422-18,621.66-11,339.84

Finding the Fourth Proportional to 12,422, 18,621.66 and 11,339.84

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Solution

The fourth proportional to 12,422, 18,621.66 and 11,339.84 is: 16,999.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,422 : 18,621.66 = 11,339.84 : x
  2. Step 2: Convert to fraction form
    12,422/18,621.66 = 11,339.84/x
  3. Step 3: Cross multiply
    12,422x = 18,621.66 × 11,339.84
  4. Step 4: Simplify right side
    12,422x = 211,166,644.93
  5. Step 5: Solve for x
    x = 211,166,644.93/12,422
  6. Step 6: Final answer
    x = 16,999.41

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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.