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Finding the Fourth Proportional to 28,808, 43,212 and 6,920

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Solution

The fourth proportional to 28,808, 43,212 and 6,920 is: 10,380

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,808 : 43,212 = 6,920 : x
  2. Step 2: Convert to fraction form
    28,808/43,212 = 6,920/x
  3. Step 3: Cross multiply
    28,808x = 43,212 × 6,920
  4. Step 4: Simplify right side
    28,808x = 299,027,040
  5. Step 5: Solve for x
    x = 299,027,040/28,808
  6. Step 6: Final answer
    x = 10,380

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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.