Home / 20,738.24-31,087.20-10,318.40

Finding the Fourth Proportional to 20,738.24, 31,087.20 and 10,318.40

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Solution

The fourth proportional to 20,738.24, 31,087.20 and 10,318.40 is: 15,467.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.24 : 31,087.20 = 10,318.40 : x
  2. Step 2: Convert to fraction form
    20,738.24/31,087.20 = 10,318.40/x
  3. Step 3: Cross multiply
    20,738.24x = 31,087.20 × 10,318.40
  4. Step 4: Simplify right side
    20,738.24x = 320,770,164.48
  5. Step 5: Solve for x
    x = 320,770,164.48/20,738.24
  6. Step 6: Final answer
    x = 15,467.57

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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.