Home / 20,834.20-31,245.10-11,345

Finding the Fourth Proportional to 20,834.20, 31,245.10 and 11,345

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Solution

The fourth proportional to 20,834.20, 31,245.10 and 11,345 is: 17,014.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,834.20 : 31,245.10 = 11,345 : x
  2. Step 2: Convert to fraction form
    20,834.20/31,245.10 = 11,345/x
  3. Step 3: Cross multiply
    20,834.20x = 31,245.10 × 11,345
  4. Step 4: Simplify right side
    20,834.20x = 354,475,659.50
  5. Step 5: Solve for x
    x = 354,475,659.50/20,834.20
  6. Step 6: Final answer
    x = 17,014.12

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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.