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Finding the Fourth Proportional to 26,418.65, 39,616.45 and 9,991.13

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Solution

The fourth proportional to 26,418.65, 39,616.45 and 9,991.13 is: 14,982.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,418.65 : 39,616.45 = 9,991.13 : x
  2. Step 2: Convert to fraction form
    26,418.65/39,616.45 = 9,991.13/x
  3. Step 3: Cross multiply
    26,418.65x = 39,616.45 × 9,991.13
  4. Step 4: Simplify right side
    26,418.65x = 395,812,879.03
  5. Step 5: Solve for x
    x = 395,812,879.03/26,418.65
  6. Step 6: Final answer
    x = 14,982.33

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.