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Finding the Fourth Proportional to 29,293.80, 43,890.30 and 13,679.40

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Solution

The fourth proportional to 29,293.80, 43,890.30 and 13,679.40 is: 20,495.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,293.80 : 43,890.30 = 13,679.40 : x
  2. Step 2: Convert to fraction form
    29,293.80/43,890.30 = 13,679.40/x
  3. Step 3: Cross multiply
    29,293.80x = 43,890.30 × 13,679.40
  4. Step 4: Simplify right side
    29,293.80x = 600,392,969.82
  5. Step 5: Solve for x
    x = 600,392,969.82/29,293.80
  6. Step 6: Final answer
    x = 20,495.56

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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.