Home / 20,828.54-28,743.26-11,268.40

Finding the Fourth Proportional to 20,828.54, 28,743.26 and 11,268.40

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Solution

The fourth proportional to 20,828.54, 28,743.26 and 11,268.40 is: 15,550.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.54 : 28,743.26 = 11,268.40 : x
  2. Step 2: Convert to fraction form
    20,828.54/28,743.26 = 11,268.40/x
  3. Step 3: Cross multiply
    20,828.54x = 28,743.26 × 11,268.40
  4. Step 4: Simplify right side
    20,828.54x = 323,890,507.30
  5. Step 5: Solve for x
    x = 323,890,507.30/20,828.54
  6. Step 6: Final answer
    x = 15,550.32

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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.