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Finding the Fourth Proportional to 8,128.89, 11,217.90 and 4,402.89

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Solution

The fourth proportional to 8,128.89, 11,217.90 and 4,402.89 is: 6,076.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.89 : 11,217.90 = 4,402.89 : x
  2. Step 2: Convert to fraction form
    8,128.89/11,217.90 = 4,402.89/x
  3. Step 3: Cross multiply
    8,128.89x = 11,217.90 × 4,402.89
  4. Step 4: Simplify right side
    8,128.89x = 49,391,179.73
  5. Step 5: Solve for x
    x = 49,391,179.73/8,128.89
  6. Step 6: Final answer
    x = 6,076.01

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1.5x scale

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.