Home / 20,744.74-28,628.16-12,786.52

Finding the Fourth Proportional to 20,744.74, 28,628.16 and 12,786.52

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Solution

The fourth proportional to 20,744.74, 28,628.16 and 12,786.52 is: 17,645.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744.74 : 28,628.16 = 12,786.52 : x
  2. Step 2: Convert to fraction form
    20,744.74/28,628.16 = 12,786.52/x
  3. Step 3: Cross multiply
    20,744.74x = 28,628.16 × 12,786.52
  4. Step 4: Simplify right side
    20,744.74x = 366,054,540.40
  5. Step 5: Solve for x
    x = 366,054,540.40/20,744.74
  6. Step 6: Final answer
    x = 17,645.66

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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.