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Finding the Fourth Proportional to 20,391.97, 30,575.48 and 18,651.63

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Solution

The fourth proportional to 20,391.97, 30,575.48 and 18,651.63 is: 27,966.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.97 : 30,575.48 = 18,651.63 : x
  2. Step 2: Convert to fraction form
    20,391.97/30,575.48 = 18,651.63/x
  3. Step 3: Cross multiply
    20,391.97x = 30,575.48 × 18,651.63
  4. Step 4: Simplify right side
    20,391.97x = 570,282,561.43
  5. Step 5: Solve for x
    x = 570,282,561.43/20,391.97
  6. Step 6: Final answer
    x = 27,966.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.