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Finding the Fourth Proportional to 17,621.10, 26,425.30 and 5,138.62

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Solution

The fourth proportional to 17,621.10, 26,425.30 and 5,138.62 is: 7,706.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,621.10 : 26,425.30 = 5,138.62 : x
  2. Step 2: Convert to fraction form
    17,621.10/26,425.30 = 5,138.62/x
  3. Step 3: Cross multiply
    17,621.10x = 26,425.30 × 5,138.62
  4. Step 4: Simplify right side
    17,621.10x = 135,789,575.09
  5. Step 5: Solve for x
    x = 135,789,575.09/17,621.10
  6. Step 6: Final answer
    x = 7,706.08

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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.