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Finding the Fourth Proportional to 43,972.80, 65,912.72 and 14,382.72

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Solution

The fourth proportional to 43,972.80, 65,912.72 and 14,382.72 is: 21,558.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,972.80 : 65,912.72 = 14,382.72 : x
  2. Step 2: Convert to fraction form
    43,972.80/65,912.72 = 14,382.72/x
  3. Step 3: Cross multiply
    43,972.80x = 65,912.72 × 14,382.72
  4. Step 4: Simplify right side
    43,972.80x = 948,004,196.20
  5. Step 5: Solve for x
    x = 948,004,196.20/43,972.80
  6. Step 6: Final answer
    x = 21,558.88

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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.