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Finding the Fourth Proportional to 26,998, 40,517.88 and 18,736

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Solution

The fourth proportional to 26,998, 40,517.88 and 18,736 is: 28,118.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,998 : 40,517.88 = 18,736 : x
  2. Step 2: Convert to fraction form
    26,998/40,517.88 = 18,736/x
  3. Step 3: Cross multiply
    26,998x = 40,517.88 × 18,736
  4. Step 4: Simplify right side
    26,998x = 759,142,999.68
  5. Step 5: Solve for x
    x = 759,142,999.68/26,998
  6. Step 6: Final answer
    x = 28,118.49

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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.