Home / 20,951.01-28,912.89-11,519.57

Finding the Fourth Proportional to 20,951.01, 28,912.89 and 11,519.57

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Solution

The fourth proportional to 20,951.01, 28,912.89 and 11,519.57 is: 15,897.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.01 : 28,912.89 = 11,519.57 : x
  2. Step 2: Convert to fraction form
    20,951.01/28,912.89 = 11,519.57/x
  3. Step 3: Cross multiply
    20,951.01x = 28,912.89 × 11,519.57
  4. Step 4: Simplify right side
    20,951.01x = 333,063,915.69
  5. Step 5: Solve for x
    x = 333,063,915.69/20,951.01
  6. Step 6: Final answer
    x = 15,897.27

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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.