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Finding the Fourth Proportional to 18,218.80, 27,322.80 and 7,119.10

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Solution

The fourth proportional to 18,218.80, 27,322.80 and 7,119.10 is: 10,676.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,218.80 : 27,322.80 = 7,119.10 : x
  2. Step 2: Convert to fraction form
    18,218.80/27,322.80 = 7,119.10/x
  3. Step 3: Cross multiply
    18,218.80x = 27,322.80 × 7,119.10
  4. Step 4: Simplify right side
    18,218.80x = 194,513,745.48
  5. Step 5: Solve for x
    x = 194,513,745.48/18,218.80
  6. Step 6: Final answer
    x = 10,676.54

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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.