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Finding the Fourth Proportional to 20,800.62, 28,702.62 and 12,303.04

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Solution

The fourth proportional to 20,800.62, 28,702.62 and 12,303.04 is: 16,976.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.62 : 28,702.62 = 12,303.04 : x
  2. Step 2: Convert to fraction form
    20,800.62/28,702.62 = 12,303.04/x
  3. Step 3: Cross multiply
    20,800.62x = 28,702.62 × 12,303.04
  4. Step 4: Simplify right side
    20,800.62x = 353,129,481.96
  5. Step 5: Solve for x
    x = 353,129,481.96/20,800.62
  6. Step 6: Final answer
    x = 16,976.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.