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Finding the Fourth Proportional to 43,808.76, 65,759.90 and 18,861.16

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Solution

The fourth proportional to 43,808.76, 65,759.90 and 18,861.16 is: 28,311.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,808.76 : 65,759.90 = 18,861.16 : x
  2. Step 2: Convert to fraction form
    43,808.76/65,759.90 = 18,861.16/x
  3. Step 3: Cross multiply
    43,808.76x = 65,759.90 × 18,861.16
  4. Step 4: Simplify right side
    43,808.76x = 1,240,307,995.48
  5. Step 5: Solve for x
    x = 1,240,307,995.48/43,808.76
  6. Step 6: Final answer
    x = 28,311.87

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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.