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Finding the Fourth Proportional to 19,910.79, 29,859.06 and 6,581.31

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Solution

The fourth proportional to 19,910.79, 29,859.06 and 6,581.31 is: 9,869.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,910.79 : 29,859.06 = 6,581.31 : x
  2. Step 2: Convert to fraction form
    19,910.79/29,859.06 = 6,581.31/x
  3. Step 3: Cross multiply
    19,910.79x = 29,859.06 × 6,581.31
  4. Step 4: Simplify right side
    19,910.79x = 196,511,730.17
  5. Step 5: Solve for x
    x = 196,511,730.17/19,910.79
  6. Step 6: Final answer
    x = 9,869.61

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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.