Home / 20,866.78-28,796.82-11,435.92

Finding the Fourth Proportional to 20,866.78, 28,796.82 and 11,435.92

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Solution

The fourth proportional to 20,866.78, 28,796.82 and 11,435.92 is: 15,781.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.78 : 28,796.82 = 11,435.92 : x
  2. Step 2: Convert to fraction form
    20,866.78/28,796.82 = 11,435.92/x
  3. Step 3: Cross multiply
    20,866.78x = 28,796.82 × 11,435.92
  4. Step 4: Simplify right side
    20,866.78x = 329,318,129.77
  5. Step 5: Solve for x
    x = 329,318,129.77/20,866.78
  6. Step 6: Final answer
    x = 15,781.93

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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.