Home / 18,418.37-27,638.49-7,322.09

Finding the Fourth Proportional to 18,418.37, 27,638.49 and 7,322.09

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Solution

The fourth proportional to 18,418.37, 27,638.49 and 7,322.09 is: 10,987.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,418.37 : 27,638.49 = 7,322.09 : x
  2. Step 2: Convert to fraction form
    18,418.37/27,638.49 = 7,322.09/x
  3. Step 3: Cross multiply
    18,418.37x = 27,638.49 × 7,322.09
  4. Step 4: Simplify right side
    18,418.37x = 202,371,373.05
  5. Step 5: Solve for x
    x = 202,371,373.05/18,418.37
  6. Step 6: Final answer
    x = 10,987.48

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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.