Home / 18,021.78-27,028.88-4,871.06

Finding the Fourth Proportional to 18,021.78, 27,028.88 and 4,871.06

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Solution

The fourth proportional to 18,021.78, 27,028.88 and 4,871.06 is: 7,305.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,021.78 : 27,028.88 = 4,871.06 : x
  2. Step 2: Convert to fraction form
    18,021.78/27,028.88 = 4,871.06/x
  3. Step 3: Cross multiply
    18,021.78x = 27,028.88 × 4,871.06
  4. Step 4: Simplify right side
    18,021.78x = 131,659,296.21
  5. Step 5: Solve for x
    x = 131,659,296.21/18,021.78
  6. Step 6: Final answer
    x = 7,305.57

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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.