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Finding the Fourth Proportional to 29,286.80, 43,930.20 and 13,491.80

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Solution

The fourth proportional to 29,286.80, 43,930.20 and 13,491.80 is: 20,237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,286.80 : 43,930.20 = 13,491.80 : x
  2. Step 2: Convert to fraction form
    29,286.80/43,930.20 = 13,491.80/x
  3. Step 3: Cross multiply
    29,286.80x = 43,930.20 × 13,491.80
  4. Step 4: Simplify right side
    29,286.80x = 592,697,472.36
  5. Step 5: Solve for x
    x = 592,697,472.36/29,286.80
  6. Step 6: Final answer
    x = 20,237.70

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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.