Home / 20,485.90-28,273.22-11,535.13

Finding the Fourth Proportional to 20,485.90, 28,273.22 and 11,535.13

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Solution

The fourth proportional to 20,485.90, 28,273.22 and 11,535.13 is: 15,919.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.90 : 28,273.22 = 11,535.13 : x
  2. Step 2: Convert to fraction form
    20,485.90/28,273.22 = 11,535.13/x
  3. Step 3: Cross multiply
    20,485.90x = 28,273.22 × 11,535.13
  4. Step 4: Simplify right side
    20,485.90x = 326,135,268.22
  5. Step 5: Solve for x
    x = 326,135,268.22/20,485.90
  6. Step 6: Final answer
    x = 15,919.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.