Home / 11,238.20-16,857.30-7,321.40

Finding the Fourth Proportional to 11,238.20, 16,857.30 and 7,321.40

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Solution

The fourth proportional to 11,238.20, 16,857.30 and 7,321.40 is: 10,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,238.20 : 16,857.30 = 7,321.40 : x
  2. Step 2: Convert to fraction form
    11,238.20/16,857.30 = 7,321.40/x
  3. Step 3: Cross multiply
    11,238.20x = 16,857.30 × 7,321.40
  4. Step 4: Simplify right side
    11,238.20x = 123,419,036.22
  5. Step 5: Solve for x
    x = 123,419,036.22/11,238.20
  6. Step 6: Final answer
    x = 10,982.10

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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.