Home / 20,565.32-30,856.20-12,249.32

Finding the Fourth Proportional to 20,565.32, 30,856.20 and 12,249.32

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Solution

The fourth proportional to 20,565.32, 30,856.20 and 12,249.32 is: 18,378.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.32 : 30,856.20 = 12,249.32 : x
  2. Step 2: Convert to fraction form
    20,565.32/30,856.20 = 12,249.32/x
  3. Step 3: Cross multiply
    20,565.32x = 30,856.20 × 12,249.32
  4. Step 4: Simplify right side
    20,565.32x = 377,967,467.78
  5. Step 5: Solve for x
    x = 377,967,467.78/20,565.32
  6. Step 6: Final answer
    x = 18,378.88

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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.