Home / 20,129.68-27,779.03-11,177.20

Finding the Fourth Proportional to 20,129.68, 27,779.03 and 11,177.20

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Solution

The fourth proportional to 20,129.68, 27,779.03 and 11,177.20 is: 15,424.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.68 : 27,779.03 = 11,177.20 : x
  2. Step 2: Convert to fraction form
    20,129.68/27,779.03 = 11,177.20/x
  3. Step 3: Cross multiply
    20,129.68x = 27,779.03 × 11,177.20
  4. Step 4: Simplify right side
    20,129.68x = 310,491,774.12
  5. Step 5: Solve for x
    x = 310,491,774.12/20,129.68
  6. Step 6: Final answer
    x = 15,424.58

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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.