Home / 20,514.78-30,752.73-10,120.86

Finding the Fourth Proportional to 20,514.78, 30,752.73 and 10,120.86

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Solution

The fourth proportional to 20,514.78, 30,752.73 and 10,120.86 is: 15,171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514.78 : 30,752.73 = 10,120.86 : x
  2. Step 2: Convert to fraction form
    20,514.78/30,752.73 = 10,120.86/x
  3. Step 3: Cross multiply
    20,514.78x = 30,752.73 × 10,120.86
  4. Step 4: Simplify right side
    20,514.78x = 311,244,074.95
  5. Step 5: Solve for x
    x = 311,244,074.95/20,514.78
  6. Step 6: Final answer
    x = 15,171.70

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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.