Home / 21,915.72-30,241.62-13,414.86

Finding the Fourth Proportional to 21,915.72, 30,241.62 and 13,414.86

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Solution

The fourth proportional to 21,915.72, 30,241.62 and 13,414.86 is: 18,511.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.72 : 30,241.62 = 13,414.86 : x
  2. Step 2: Convert to fraction form
    21,915.72/30,241.62 = 13,414.86/x
  3. Step 3: Cross multiply
    21,915.72x = 30,241.62 × 13,414.86
  4. Step 4: Simplify right side
    21,915.72x = 405,687,098.47
  5. Step 5: Solve for x
    x = 405,687,098.47/21,915.72
  6. Step 6: Final answer
    x = 18,511.24

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1.5x scale

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.