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Finding the Fourth Proportional to 26,881, 40,321.50 and 7,425

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Solution

The fourth proportional to 26,881, 40,321.50 and 7,425 is: 11,137.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,881 : 40,321.50 = 7,425 : x
  2. Step 2: Convert to fraction form
    26,881/40,321.50 = 7,425/x
  3. Step 3: Cross multiply
    26,881x = 40,321.50 × 7,425
  4. Step 4: Simplify right side
    26,881x = 299,387,137.50
  5. Step 5: Solve for x
    x = 299,387,137.50/26,881
  6. Step 6: Final answer
    x = 11,137.50

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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.