Home / 20,131.20-30,164.40-10,255.68

Finding the Fourth Proportional to 20,131.20, 30,164.40 and 10,255.68

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Solution

The fourth proportional to 20,131.20, 30,164.40 and 10,255.68 is: 15,367.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.20 : 30,164.40 = 10,255.68 : x
  2. Step 2: Convert to fraction form
    20,131.20/30,164.40 = 10,255.68/x
  3. Step 3: Cross multiply
    20,131.20x = 30,164.40 × 10,255.68
  4. Step 4: Simplify right side
    20,131.20x = 309,356,433.79
  5. Step 5: Solve for x
    x = 309,356,433.79/20,131.20
  6. Step 6: Final answer
    x = 15,367.01

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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.