Home / 20,911.35-31,366.85-9,224.58

Finding the Fourth Proportional to 20,911.35, 31,366.85 and 9,224.58

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Solution

The fourth proportional to 20,911.35, 31,366.85 and 9,224.58 is: 13,836.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.35 : 31,366.85 = 9,224.58 : x
  2. Step 2: Convert to fraction form
    20,911.35/31,366.85 = 9,224.58/x
  3. Step 3: Cross multiply
    20,911.35x = 31,366.85 × 9,224.58
  4. Step 4: Simplify right side
    20,911.35x = 289,345,971.05
  5. Step 5: Solve for x
    x = 289,345,971.05/20,911.35
  6. Step 6: Final answer
    x = 13,836.79

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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.