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Finding the Fourth Proportional to 43,505, 65,257.50 and 18,881

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Solution

The fourth proportional to 43,505, 65,257.50 and 18,881 is: 28,321.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,505 : 65,257.50 = 18,881 : x
  2. Step 2: Convert to fraction form
    43,505/65,257.50 = 18,881/x
  3. Step 3: Cross multiply
    43,505x = 65,257.50 × 18,881
  4. Step 4: Simplify right side
    43,505x = 1,232,126,857.50
  5. Step 5: Solve for x
    x = 1,232,126,857.50/43,505
  6. Step 6: Final answer
    x = 28,321.50

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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.