Home / 20,836.37-31,240.62-11,480.87

Finding the Fourth Proportional to 20,836.37, 31,240.62 and 11,480.87

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Solution

The fourth proportional to 20,836.37, 31,240.62 and 11,480.87 is: 17,213.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.37 : 31,240.62 = 11,480.87 : x
  2. Step 2: Convert to fraction form
    20,836.37/31,240.62 = 11,480.87/x
  3. Step 3: Cross multiply
    20,836.37x = 31,240.62 × 11,480.87
  4. Step 4: Simplify right side
    20,836.37x = 358,669,340.74
  5. Step 5: Solve for x
    x = 358,669,340.74/20,836.37
  6. Step 6: Final answer
    x = 17,213.62

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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.