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Finding the Fourth Proportional to 18,578.70, 27,860.22 and 7,900.74

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Solution

The fourth proportional to 18,578.70, 27,860.22 and 7,900.74 is: 11,847.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578.70 : 27,860.22 = 7,900.74 : x
  2. Step 2: Convert to fraction form
    18,578.70/27,860.22 = 7,900.74/x
  3. Step 3: Cross multiply
    18,578.70x = 27,860.22 × 7,900.74
  4. Step 4: Simplify right side
    18,578.70x = 220,116,354.56
  5. Step 5: Solve for x
    x = 220,116,354.56/18,578.70
  6. Step 6: Final answer
    x = 11,847.78

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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.