Home / 20,379.82-28,124.46-11,305.12

Finding the Fourth Proportional to 20,379.82, 28,124.46 and 11,305.12

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Solution

The fourth proportional to 20,379.82, 28,124.46 and 11,305.12 is: 15,601.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.82 : 28,124.46 = 11,305.12 : x
  2. Step 2: Convert to fraction form
    20,379.82/28,124.46 = 11,305.12/x
  3. Step 3: Cross multiply
    20,379.82x = 28,124.46 × 11,305.12
  4. Step 4: Simplify right side
    20,379.82x = 317,950,395.24
  5. Step 5: Solve for x
    x = 317,950,395.24/20,379.82
  6. Step 6: Final answer
    x = 15,601.24

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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.