Home / 20,786.90-28,694.13-12,832.34

Finding the Fourth Proportional to 20,786.90, 28,694.13 and 12,832.34

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Solution

The fourth proportional to 20,786.90, 28,694.13 and 12,832.34 is: 17,713.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.90 : 28,694.13 = 12,832.34 : x
  2. Step 2: Convert to fraction form
    20,786.90/28,694.13 = 12,832.34/x
  3. Step 3: Cross multiply
    20,786.90x = 28,694.13 × 12,832.34
  4. Step 4: Simplify right side
    20,786.90x = 368,212,832.16
  5. Step 5: Solve for x
    x = 368,212,832.16/20,786.90
  6. Step 6: Final answer
    x = 17,713.70

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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.