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Finding the Fourth Proportional to 17,123.80, 25,704.90 and 13,245.40

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Solution

The fourth proportional to 17,123.80, 25,704.90 and 13,245.40 is: 19,882.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,123.80 : 25,704.90 = 13,245.40 : x
  2. Step 2: Convert to fraction form
    17,123.80/25,704.90 = 13,245.40/x
  3. Step 3: Cross multiply
    17,123.80x = 25,704.90 × 13,245.40
  4. Step 4: Simplify right side
    17,123.80x = 340,471,682.46
  5. Step 5: Solve for x
    x = 340,471,682.46/17,123.80
  6. Step 6: Final answer
    x = 19,882.95

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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.