Home / 20,129.56-27,779.12-11,177.64

Finding the Fourth Proportional to 20,129.56, 27,779.12 and 11,177.64

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Solution

The fourth proportional to 20,129.56, 27,779.12 and 11,177.64 is: 15,425.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.56 : 27,779.12 = 11,177.64 : x
  2. Step 2: Convert to fraction form
    20,129.56/27,779.12 = 11,177.64/x
  3. Step 3: Cross multiply
    20,129.56x = 27,779.12 × 11,177.64
  4. Step 4: Simplify right side
    20,129.56x = 310,505,002.88
  5. Step 5: Solve for x
    x = 310,505,002.88/20,129.56
  6. Step 6: Final answer
    x = 15,425.32

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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.