Home / 21,879.72-30,195.18-12,451.32

Finding the Fourth Proportional to 21,879.72, 30,195.18 and 12,451.32

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Solution

The fourth proportional to 21,879.72, 30,195.18 and 12,451.32 is: 17,183.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.72 : 30,195.18 = 12,451.32 : x
  2. Step 2: Convert to fraction form
    21,879.72/30,195.18 = 12,451.32/x
  3. Step 3: Cross multiply
    21,879.72x = 30,195.18 × 12,451.32
  4. Step 4: Simplify right side
    21,879.72x = 375,969,848.64
  5. Step 5: Solve for x
    x = 375,969,848.64/21,879.72
  6. Step 6: Final answer
    x = 17,183.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.