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Finding the Fourth Proportional to 8,862.89, 13,286.78 and 3,929.84

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Solution

The fourth proportional to 8,862.89, 13,286.78 and 3,929.84 is: 5,891.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,862.89 : 13,286.78 = 3,929.84 : x
  2. Step 2: Convert to fraction form
    8,862.89/13,286.78 = 3,929.84/x
  3. Step 3: Cross multiply
    8,862.89x = 13,286.78 × 3,929.84
  4. Step 4: Simplify right side
    8,862.89x = 52,214,833.43
  5. Step 5: Solve for x
    x = 52,214,833.43/8,862.89
  6. Step 6: Final answer
    x = 5,891.40

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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.