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Finding the Fourth Proportional to 18,653.76, 27,990.72 and 11,272.32

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Solution

The fourth proportional to 18,653.76, 27,990.72 and 11,272.32 is: 16,914.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.76 : 27,990.72 = 11,272.32 : x
  2. Step 2: Convert to fraction form
    18,653.76/27,990.72 = 11,272.32/x
  3. Step 3: Cross multiply
    18,653.76x = 27,990.72 × 11,272.32
  4. Step 4: Simplify right side
    18,653.76x = 315,520,352.87
  5. Step 5: Solve for x
    x = 315,520,352.87/18,653.76
  6. Step 6: Final answer
    x = 16,914.57

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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.