Home / 20,812.24-31,198.20-10,392.40

Finding the Fourth Proportional to 20,812.24, 31,198.20 and 10,392.40

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Solution

The fourth proportional to 20,812.24, 31,198.20 and 10,392.40 is: 15,578.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.24 : 31,198.20 = 10,392.40 : x
  2. Step 2: Convert to fraction form
    20,812.24/31,198.20 = 10,392.40/x
  3. Step 3: Cross multiply
    20,812.24x = 31,198.20 × 10,392.40
  4. Step 4: Simplify right side
    20,812.24x = 324,224,173.68
  5. Step 5: Solve for x
    x = 324,224,173.68/20,812.24
  6. Step 6: Final answer
    x = 15,578.53

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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.