Home / 21,212.90-29,273.23-11,780.86

Finding the Fourth Proportional to 21,212.90, 29,273.23 and 11,780.86

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Solution

The fourth proportional to 21,212.90, 29,273.23 and 11,780.86 is: 16,257.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.90 : 29,273.23 = 11,780.86 : x
  2. Step 2: Convert to fraction form
    21,212.90/29,273.23 = 11,780.86/x
  3. Step 3: Cross multiply
    21,212.90x = 29,273.23 × 11,780.86
  4. Step 4: Simplify right side
    21,212.90x = 344,863,824.38
  5. Step 5: Solve for x
    x = 344,863,824.38/21,212.90
  6. Step 6: Final answer
    x = 16,257.27

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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.