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Finding the Fourth Proportional to 8,805.78, 13,209.89 and 2,961.02

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Solution

The fourth proportional to 8,805.78, 13,209.89 and 2,961.02 is: 4,441.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,805.78 : 13,209.89 = 2,961.02 : x
  2. Step 2: Convert to fraction form
    8,805.78/13,209.89 = 2,961.02/x
  3. Step 3: Cross multiply
    8,805.78x = 13,209.89 × 2,961.02
  4. Step 4: Simplify right side
    8,805.78x = 39,114,766.71
  5. Step 5: Solve for x
    x = 39,114,766.71/8,805.78
  6. Step 6: Final answer
    x = 4,441.94

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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.