Home / 20,890.62-31,337.42-8,410.68

Finding the Fourth Proportional to 20,890.62, 31,337.42 and 8,410.68

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Solution

The fourth proportional to 20,890.62, 31,337.42 and 8,410.68 is: 12,616.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.62 : 31,337.42 = 8,410.68 : x
  2. Step 2: Convert to fraction form
    20,890.62/31,337.42 = 8,410.68/x
  3. Step 3: Cross multiply
    20,890.62x = 31,337.42 × 8,410.68
  4. Step 4: Simplify right side
    20,890.62x = 263,568,969.59
  5. Step 5: Solve for x
    x = 263,568,969.59/20,890.62
  6. Step 6: Final answer
    x = 12,616.62

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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.