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Finding the Fourth Proportional to 18,371.55, 27,556.71 and 7,983.30

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Solution

The fourth proportional to 18,371.55, 27,556.71 and 7,983.30 is: 11,974.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,371.55 : 27,556.71 = 7,983.30 : x
  2. Step 2: Convert to fraction form
    18,371.55/27,556.71 = 7,983.30/x
  3. Step 3: Cross multiply
    18,371.55x = 27,556.71 × 7,983.30
  4. Step 4: Simplify right side
    18,371.55x = 219,993,482.94
  5. Step 5: Solve for x
    x = 219,993,482.94/18,371.55
  6. Step 6: Final answer
    x = 11,974.68

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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.