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Finding the Fourth Proportional to 8,091.64, 12,138.89 and 3,347.79

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Solution

The fourth proportional to 8,091.64, 12,138.89 and 3,347.79 is: 5,022.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,091.64 : 12,138.89 = 3,347.79 : x
  2. Step 2: Convert to fraction form
    8,091.64/12,138.89 = 3,347.79/x
  3. Step 3: Cross multiply
    8,091.64x = 12,138.89 × 3,347.79
  4. Step 4: Simplify right side
    8,091.64x = 40,638,392.29
  5. Step 5: Solve for x
    x = 40,638,392.29/8,091.64
  6. Step 6: Final answer
    x = 5,022.27

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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.