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Finding the Fourth Proportional to 20,651.62, 30,936.12 and 15,955.24

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Solution

The fourth proportional to 20,651.62, 30,936.12 and 15,955.24 is: 23,900.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.62 : 30,936.12 = 15,955.24 : x
  2. Step 2: Convert to fraction form
    20,651.62/30,936.12 = 15,955.24/x
  3. Step 3: Cross multiply
    20,651.62x = 30,936.12 × 15,955.24
  4. Step 4: Simplify right side
    20,651.62x = 493,593,219.27
  5. Step 5: Solve for x
    x = 493,593,219.27/20,651.62
  6. Step 6: Final answer
    x = 23,900.94

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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.