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Finding the Fourth Proportional to 17,162.62, 25,697.11 and 12,990.01

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Solution

The fourth proportional to 17,162.62, 25,697.11 and 12,990.01 is: 19,449.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,162.62 : 25,697.11 = 12,990.01 : x
  2. Step 2: Convert to fraction form
    17,162.62/25,697.11 = 12,990.01/x
  3. Step 3: Cross multiply
    17,162.62x = 25,697.11 × 12,990.01
  4. Step 4: Simplify right side
    17,162.62x = 333,805,715.87
  5. Step 5: Solve for x
    x = 333,805,715.87/17,162.62
  6. Step 6: Final answer
    x = 19,449.58

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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.