Home / 20,131.52-27,779.42-11,178.04

Finding the Fourth Proportional to 20,131.52, 27,779.42 and 11,178.04

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Solution

The fourth proportional to 20,131.52, 27,779.42 and 11,178.04 is: 15,424.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.52 : 27,779.42 = 11,178.04 : x
  2. Step 2: Convert to fraction form
    20,131.52/27,779.42 = 11,178.04/x
  3. Step 3: Cross multiply
    20,131.52x = 27,779.42 × 11,178.04
  4. Step 4: Simplify right side
    20,131.52x = 310,519,467.94
  5. Step 5: Solve for x
    x = 310,519,467.94/20,131.52
  6. Step 6: Final answer
    x = 15,424.54

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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.