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Finding the Fourth Proportional to 16,821.80, 25,232.70 and 11,791.70

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Solution

The fourth proportional to 16,821.80, 25,232.70 and 11,791.70 is: 17,687.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,821.80 : 25,232.70 = 11,791.70 : x
  2. Step 2: Convert to fraction form
    16,821.80/25,232.70 = 11,791.70/x
  3. Step 3: Cross multiply
    16,821.80x = 25,232.70 × 11,791.70
  4. Step 4: Simplify right side
    16,821.80x = 297,536,428.59
  5. Step 5: Solve for x
    x = 297,536,428.59/16,821.80
  6. Step 6: Final answer
    x = 17,687.55

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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.