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Finding the Fourth Proportional to 43,912.66, 65,883.78 and 13,931.86

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Solution

The fourth proportional to 43,912.66, 65,883.78 and 13,931.86 is: 20,902.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,912.66 : 65,883.78 = 13,931.86 : x
  2. Step 2: Convert to fraction form
    43,912.66/65,883.78 = 13,931.86/x
  3. Step 3: Cross multiply
    43,912.66x = 65,883.78 × 13,931.86
  4. Step 4: Simplify right side
    43,912.66x = 917,883,599.23
  5. Step 5: Solve for x
    x = 917,883,599.23/43,912.66
  6. Step 6: Final answer
    x = 20,902.48

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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.