Home / 20,274-27,981.36-11,890.56

Finding the Fourth Proportional to 20,274, 27,981.36 and 11,890.56

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Solution

The fourth proportional to 20,274, 27,981.36 and 11,890.56 is: 16,410.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,274 : 27,981.36 = 11,890.56 : x
  2. Step 2: Convert to fraction form
    20,274/27,981.36 = 11,890.56/x
  3. Step 3: Cross multiply
    20,274x = 27,981.36 × 11,890.56
  4. Step 4: Simplify right side
    20,274x = 332,714,039.96
  5. Step 5: Solve for x
    x = 332,714,039.96/20,274
  6. Step 6: Final answer
    x = 16,410.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.