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Finding the Fourth Proportional to 14,651.29, 20,218.83 and 7,936.90

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Solution

The fourth proportional to 14,651.29, 20,218.83 and 7,936.90 is: 10,952.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,651.29 : 20,218.83 = 7,936.90 : x
  2. Step 2: Convert to fraction form
    14,651.29/20,218.83 = 7,936.90/x
  3. Step 3: Cross multiply
    14,651.29x = 20,218.83 × 7,936.90
  4. Step 4: Simplify right side
    14,651.29x = 160,474,781.28
  5. Step 5: Solve for x
    x = 160,474,781.28/14,651.29
  6. Step 6: Final answer
    x = 10,952.95

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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.