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Finding the Fourth Proportional to 20,498.40, 30,704.40 and 17,042.40

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Solution

The fourth proportional to 20,498.40, 30,704.40 and 17,042.40 is: 25,527.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,498.40 : 30,704.40 = 17,042.40 : x
  2. Step 2: Convert to fraction form
    20,498.40/30,704.40 = 17,042.40/x
  3. Step 3: Cross multiply
    20,498.40x = 30,704.40 × 17,042.40
  4. Step 4: Simplify right side
    20,498.40x = 523,276,666.56
  5. Step 5: Solve for x
    x = 523,276,666.56/20,498.40
  6. Step 6: Final answer
    x = 25,527.68

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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.