Home / 20,879.29-28,796.68-18,356.05

Finding the Fourth Proportional to 20,879.29, 28,796.68 and 18,356.05

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Solution

The fourth proportional to 20,879.29, 28,796.68 and 18,356.05 is: 25,316.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.29 : 28,796.68 = 18,356.05 : x
  2. Step 2: Convert to fraction form
    20,879.29/28,796.68 = 18,356.05/x
  3. Step 3: Cross multiply
    20,879.29x = 28,796.68 × 18,356.05
  4. Step 4: Simplify right side
    20,879.29x = 528,593,297.91
  5. Step 5: Solve for x
    x = 528,593,297.91/20,879.29
  6. Step 6: Final answer
    x = 25,316.63

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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.