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Finding the Fourth Proportional to 18,488.50, 27,721.66 and 8,480.70

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Solution

The fourth proportional to 18,488.50, 27,721.66 and 8,480.70 is: 12,715.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,488.50 : 27,721.66 = 8,480.70 : x
  2. Step 2: Convert to fraction form
    18,488.50/27,721.66 = 8,480.70/x
  3. Step 3: Cross multiply
    18,488.50x = 27,721.66 × 8,480.70
  4. Step 4: Simplify right side
    18,488.50x = 235,099,081.96
  5. Step 5: Solve for x
    x = 235,099,081.96/18,488.50
  6. Step 6: Final answer
    x = 12,715.96

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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.