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Finding the Fourth Proportional to 28,668.34, 39,560.99 and 15,922.34

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Solution

The fourth proportional to 28,668.34, 39,560.99 and 15,922.34 is: 21,972.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,668.34 : 39,560.99 = 15,922.34 : x
  2. Step 2: Convert to fraction form
    28,668.34/39,560.99 = 15,922.34/x
  3. Step 3: Cross multiply
    28,668.34x = 39,560.99 × 15,922.34
  4. Step 4: Simplify right side
    28,668.34x = 629,903,375.52
  5. Step 5: Solve for x
    x = 629,903,375.52/28,668.34
  6. Step 6: Final answer
    x = 21,972.09

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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.