Home / 20,786.22-28,685.34-11,356.20

Finding the Fourth Proportional to 20,786.22, 28,685.34 and 11,356.20

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Solution

The fourth proportional to 20,786.22, 28,685.34 and 11,356.20 is: 15,671.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.22 : 28,685.34 = 11,356.20 : x
  2. Step 2: Convert to fraction form
    20,786.22/28,685.34 = 11,356.20/x
  3. Step 3: Cross multiply
    20,786.22x = 28,685.34 × 11,356.20
  4. Step 4: Simplify right side
    20,786.22x = 325,756,458.11
  5. Step 5: Solve for x
    x = 325,756,458.11/20,786.22
  6. Step 6: Final answer
    x = 15,671.75

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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.