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Finding the Fourth Proportional to 18,827.27, 28,240.18 and 5,679.28

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Solution

The fourth proportional to 18,827.27, 28,240.18 and 5,679.28 is: 8,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,827.27 : 28,240.18 = 5,679.28 : x
  2. Step 2: Convert to fraction form
    18,827.27/28,240.18 = 5,679.28/x
  3. Step 3: Cross multiply
    18,827.27x = 28,240.18 × 5,679.28
  4. Step 4: Simplify right side
    18,827.27x = 160,383,910.57
  5. Step 5: Solve for x
    x = 160,383,910.57/18,827.27
  6. Step 6: Final answer
    x = 8,518.70

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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.