Home / 20,786.98-28,686.82-11,355.62

Finding the Fourth Proportional to 20,786.98, 28,686.82 and 11,355.62

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Solution

The fourth proportional to 20,786.98, 28,686.82 and 11,355.62 is: 15,671.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.98 : 28,686.82 = 11,355.62 : x
  2. Step 2: Convert to fraction form
    20,786.98/28,686.82 = 11,355.62/x
  3. Step 3: Cross multiply
    20,786.98x = 28,686.82 × 11,355.62
  4. Step 4: Simplify right side
    20,786.98x = 325,756,626.93
  5. Step 5: Solve for x
    x = 325,756,626.93/20,786.98
  6. Step 6: Final answer
    x = 15,671.19

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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.