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Finding the Fourth Proportional to 43,930.53, 65,813.13 and 21,717.90

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Solution

The fourth proportional to 43,930.53, 65,813.13 and 21,717.90 is: 32,535.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,930.53 : 65,813.13 = 21,717.90 : x
  2. Step 2: Convert to fraction form
    43,930.53/65,813.13 = 21,717.90/x
  3. Step 3: Cross multiply
    43,930.53x = 65,813.13 × 21,717.90
  4. Step 4: Simplify right side
    43,930.53x = 1,429,322,976.03
  5. Step 5: Solve for x
    x = 1,429,322,976.03/43,930.53
  6. Step 6: Final answer
    x = 32,535.98

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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.