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Finding the Fourth Proportional to 7,666.31, 11,494.15 and 3,910.80

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Solution

The fourth proportional to 7,666.31, 11,494.15 and 3,910.80 is: 5,863.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,666.31 : 11,494.15 = 3,910.80 : x
  2. Step 2: Convert to fraction form
    7,666.31/11,494.15 = 3,910.80/x
  3. Step 3: Cross multiply
    7,666.31x = 11,494.15 × 3,910.80
  4. Step 4: Simplify right side
    7,666.31x = 44,951,244.80
  5. Step 5: Solve for x
    x = 44,951,244.80/7,666.31
  6. Step 6: Final answer
    x = 5,863.48

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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.