Home / 18,879.12-28,340.56-10,131.12

Finding the Fourth Proportional to 18,879.12, 28,340.56 and 10,131.12

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Solution

The fourth proportional to 18,879.12, 28,340.56 and 10,131.12 is: 15,208.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.12 : 28,340.56 = 10,131.12 : x
  2. Step 2: Convert to fraction form
    18,879.12/28,340.56 = 10,131.12/x
  3. Step 3: Cross multiply
    18,879.12x = 28,340.56 × 10,131.12
  4. Step 4: Simplify right side
    18,879.12x = 287,121,614.23
  5. Step 5: Solve for x
    x = 287,121,614.23/18,879.12
  6. Step 6: Final answer
    x = 15,208.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.