Home / 20,120.68-30,186.78-9,738.28

Finding the Fourth Proportional to 20,120.68, 30,186.78 and 9,738.28

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Solution

The fourth proportional to 20,120.68, 30,186.78 and 9,738.28 is: 14,610.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.68 : 30,186.78 = 9,738.28 : x
  2. Step 2: Convert to fraction form
    20,120.68/30,186.78 = 9,738.28/x
  3. Step 3: Cross multiply
    20,120.68x = 30,186.78 × 9,738.28
  4. Step 4: Simplify right side
    20,120.68x = 293,967,315.94
  5. Step 5: Solve for x
    x = 293,967,315.94/20,120.68
  6. Step 6: Final answer
    x = 14,610.21

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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.