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Finding the Fourth Proportional to 18,639.72, 27,922.74 and 11,222.28

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Solution

The fourth proportional to 18,639.72, 27,922.74 and 11,222.28 is: 16,811.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.72 : 27,922.74 = 11,222.28 : x
  2. Step 2: Convert to fraction form
    18,639.72/27,922.74 = 11,222.28/x
  3. Step 3: Cross multiply
    18,639.72x = 27,922.74 × 11,222.28
  4. Step 4: Simplify right side
    18,639.72x = 313,356,806.65
  5. Step 5: Solve for x
    x = 313,356,806.65/18,639.72
  6. Step 6: Final answer
    x = 16,811.24

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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.