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Finding the Fourth Proportional to 17,138.20, 25,707.30 and 13,245.40

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Solution

The fourth proportional to 17,138.20, 25,707.30 and 13,245.40 is: 19,868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,138.20 : 25,707.30 = 13,245.40 : x
  2. Step 2: Convert to fraction form
    17,138.20/25,707.30 = 13,245.40/x
  3. Step 3: Cross multiply
    17,138.20x = 25,707.30 × 13,245.40
  4. Step 4: Simplify right side
    17,138.20x = 340,503,471.42
  5. Step 5: Solve for x
    x = 340,503,471.42/17,138.20
  6. Step 6: Final answer
    x = 19,868.10

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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.