Home / 20,079.76-30,120.60-10,216.24

Finding the Fourth Proportional to 20,079.76, 30,120.60 and 10,216.24

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Solution

The fourth proportional to 20,079.76, 30,120.60 and 10,216.24 is: 15,324.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.76 : 30,120.60 = 10,216.24 : x
  2. Step 2: Convert to fraction form
    20,079.76/30,120.60 = 10,216.24/x
  3. Step 3: Cross multiply
    20,079.76x = 30,120.60 × 10,216.24
  4. Step 4: Simplify right side
    20,079.76x = 307,719,278.54
  5. Step 5: Solve for x
    x = 307,719,278.54/20,079.76
  6. Step 6: Final answer
    x = 15,324.85

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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.