Home / 20,520.45-30,785.43-6,481.87

Finding the Fourth Proportional to 20,520.45, 30,785.43 and 6,481.87

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Solution

The fourth proportional to 20,520.45, 30,785.43 and 6,481.87 is: 9,724.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.45 : 30,785.43 = 6,481.87 : x
  2. Step 2: Convert to fraction form
    20,520.45/30,785.43 = 6,481.87/x
  3. Step 3: Cross multiply
    20,520.45x = 30,785.43 × 6,481.87
  4. Step 4: Simplify right side
    20,520.45x = 199,547,155.15
  5. Step 5: Solve for x
    x = 199,547,155.15/20,520.45
  6. Step 6: Final answer
    x = 9,724.31

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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.