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Finding the Fourth Proportional to 43,486.91, 65,241.90 and 13,905.29

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Solution

The fourth proportional to 43,486.91, 65,241.90 and 13,905.29 is: 20,861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,486.91 : 65,241.90 = 13,905.29 : x
  2. Step 2: Convert to fraction form
    43,486.91/65,241.90 = 13,905.29/x
  3. Step 3: Cross multiply
    43,486.91x = 65,241.90 × 13,905.29
  4. Step 4: Simplify right side
    43,486.91x = 907,207,539.65
  5. Step 5: Solve for x
    x = 907,207,539.65/43,486.91
  6. Step 6: Final answer
    x = 20,861.62

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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.