Home / 21,342.56-29,452.82-12,390.44

Finding the Fourth Proportional to 21,342.56, 29,452.82 and 12,390.44

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Solution

The fourth proportional to 21,342.56, 29,452.82 and 12,390.44 is: 17,098.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.56 : 29,452.82 = 12,390.44 : x
  2. Step 2: Convert to fraction form
    21,342.56/29,452.82 = 12,390.44/x
  3. Step 3: Cross multiply
    21,342.56x = 29,452.82 × 12,390.44
  4. Step 4: Simplify right side
    21,342.56x = 364,933,189.82
  5. Step 5: Solve for x
    x = 364,933,189.82/21,342.56
  6. Step 6: Final answer
    x = 17,098.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.