Home / 20,786.97-28,686.02-11,226.87

Finding the Fourth Proportional to 20,786.97, 28,686.02 and 11,226.87

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Solution

The fourth proportional to 20,786.97, 28,686.02 and 11,226.87 is: 15,493.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.97 : 28,686.02 = 11,226.87 : x
  2. Step 2: Convert to fraction form
    20,786.97/28,686.02 = 11,226.87/x
  3. Step 3: Cross multiply
    20,786.97x = 28,686.02 × 11,226.87
  4. Step 4: Simplify right side
    20,786.97x = 322,054,095.75
  5. Step 5: Solve for x
    x = 322,054,095.75/20,786.97
  6. Step 6: Final answer
    x = 15,493.07

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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.