Home / 18,879.12-28,333.26-13,320.54

Finding the Fourth Proportional to 18,879.12, 28,333.26 and 13,320.54

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Solution

The fourth proportional to 18,879.12, 28,333.26 and 13,320.54 is: 19,991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879.12 : 28,333.26 = 13,320.54 : x
  2. Step 2: Convert to fraction form
    18,879.12/28,333.26 = 13,320.54/x
  3. Step 3: Cross multiply
    18,879.12x = 28,333.26 × 13,320.54
  4. Step 4: Simplify right side
    18,879.12x = 377,414,323.16
  5. Step 5: Solve for x
    x = 377,414,323.16/18,879.12
  6. Step 6: Final answer
    x = 19,991.10

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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.