Home / 28,786.27-39,722.36-21,236.80

Finding the Fourth Proportional to 28,786.27, 39,722.36 and 21,236.80

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Solution

The fourth proportional to 28,786.27, 39,722.36 and 21,236.80 is: 29,304.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,786.27 : 39,722.36 = 21,236.80 : x
  2. Step 2: Convert to fraction form
    28,786.27/39,722.36 = 21,236.80/x
  3. Step 3: Cross multiply
    28,786.27x = 39,722.36 × 21,236.80
  4. Step 4: Simplify right side
    28,786.27x = 843,575,814.85
  5. Step 5: Solve for x
    x = 843,575,814.85/28,786.27
  6. Step 6: Final answer
    x = 29,304.80

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1.5x scale

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.