Home / 20,836.54-28,753.31-11,403.28

Finding the Fourth Proportional to 20,836.54, 28,753.31 and 11,403.28

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Solution

The fourth proportional to 20,836.54, 28,753.31 and 11,403.28 is: 15,735.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.54 : 28,753.31 = 11,403.28 : x
  2. Step 2: Convert to fraction form
    20,836.54/28,753.31 = 11,403.28/x
  3. Step 3: Cross multiply
    20,836.54x = 28,753.31 × 11,403.28
  4. Step 4: Simplify right side
    20,836.54x = 327,881,844.07
  5. Step 5: Solve for x
    x = 327,881,844.07/20,836.54
  6. Step 6: Final answer
    x = 15,735.91

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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.