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Finding the Fourth Proportional to 18,906.66, 28,364.22 and 5,760.06

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Solution

The fourth proportional to 18,906.66, 28,364.22 and 5,760.06 is: 8,641.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.66 : 28,364.22 = 5,760.06 : x
  2. Step 2: Convert to fraction form
    18,906.66/28,364.22 = 5,760.06/x
  3. Step 3: Cross multiply
    18,906.66x = 28,364.22 × 5,760.06
  4. Step 4: Simplify right side
    18,906.66x = 163,379,609.05
  5. Step 5: Solve for x
    x = 163,379,609.05/18,906.66
  6. Step 6: Final answer
    x = 8,641.38

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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.