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Finding the Fourth Proportional to 18,018.87, 27,028.80 and 4,871.22

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Solution

The fourth proportional to 18,018.87, 27,028.80 and 4,871.22 is: 7,306.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,018.87 : 27,028.80 = 4,871.22 : x
  2. Step 2: Convert to fraction form
    18,018.87/27,028.80 = 4,871.22/x
  3. Step 3: Cross multiply
    18,018.87x = 27,028.80 × 4,871.22
  4. Step 4: Simplify right side
    18,018.87x = 131,663,231.14
  5. Step 5: Solve for x
    x = 131,663,231.14/18,018.87
  6. Step 6: Final answer
    x = 7,306.96

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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.