Home / 17,982.57-26,960.31-12,420.03

Finding the Fourth Proportional to 17,982.57, 26,960.31 and 12,420.03

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Solution

The fourth proportional to 17,982.57, 26,960.31 and 12,420.03 is: 18,620.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,982.57 : 26,960.31 = 12,420.03 : x
  2. Step 2: Convert to fraction form
    17,982.57/26,960.31 = 12,420.03/x
  3. Step 3: Cross multiply
    17,982.57x = 26,960.31 × 12,420.03
  4. Step 4: Simplify right side
    17,982.57x = 334,847,859.01
  5. Step 5: Solve for x
    x = 334,847,859.01/17,982.57
  6. Step 6: Final answer
    x = 18,620.69

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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.