Home / 21,221.56-31,818.42-11,862.57

Finding the Fourth Proportional to 21,221.56, 31,818.42 and 11,862.57

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Solution

The fourth proportional to 21,221.56, 31,818.42 and 11,862.57 is: 17,786.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.56 : 31,818.42 = 11,862.57 : x
  2. Step 2: Convert to fraction form
    21,221.56/31,818.42 = 11,862.57/x
  3. Step 3: Cross multiply
    21,221.56x = 31,818.42 × 11,862.57
  4. Step 4: Simplify right side
    21,221.56x = 377,448,234.54
  5. Step 5: Solve for x
    x = 377,448,234.54/21,221.56
  6. Step 6: Final answer
    x = 17,786.07

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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.