Home / 21,429.30-32,149.05-8,942.39

Finding the Fourth Proportional to 21,429.30, 32,149.05 and 8,942.39

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Solution

The fourth proportional to 21,429.30, 32,149.05 and 8,942.39 is: 13,415.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.30 : 32,149.05 = 8,942.39 : x
  2. Step 2: Convert to fraction form
    21,429.30/32,149.05 = 8,942.39/x
  3. Step 3: Cross multiply
    21,429.30x = 32,149.05 × 8,942.39
  4. Step 4: Simplify right side
    21,429.30x = 287,489,343.23
  5. Step 5: Solve for x
    x = 287,489,343.23/21,429.30
  6. Step 6: Final answer
    x = 13,415.71

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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.