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Finding the Fourth Proportional to 8,920.76, 13,383.19 and 2,680.89

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Solution

The fourth proportional to 8,920.76, 13,383.19 and 2,680.89 is: 4,021.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.76 : 13,383.19 = 2,680.89 : x
  2. Step 2: Convert to fraction form
    8,920.76/13,383.19 = 2,680.89/x
  3. Step 3: Cross multiply
    8,920.76x = 13,383.19 × 2,680.89
  4. Step 4: Simplify right side
    8,920.76x = 35,878,860.24
  5. Step 5: Solve for x
    x = 35,878,860.24/8,920.76
  6. Step 6: Final answer
    x = 4,021.95

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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.