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Finding the Fourth Proportional to 8,665.43, 12,998.03 and 2,091.56

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Solution

The fourth proportional to 8,665.43, 12,998.03 and 2,091.56 is: 3,137.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,665.43 : 12,998.03 = 2,091.56 : x
  2. Step 2: Convert to fraction form
    8,665.43/12,998.03 = 2,091.56/x
  3. Step 3: Cross multiply
    8,665.43x = 12,998.03 × 2,091.56
  4. Step 4: Simplify right side
    8,665.43x = 27,186,159.63
  5. Step 5: Solve for x
    x = 27,186,159.63/8,665.43
  6. Step 6: Final answer
    x = 3,137.31

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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.