Home / 21,635.38-29,858.94-13,135.54

Finding the Fourth Proportional to 21,635.38, 29,858.94 and 13,135.54

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Solution

The fourth proportional to 21,635.38, 29,858.94 and 13,135.54 is: 18,128.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,635.38 : 29,858.94 = 13,135.54 : x
  2. Step 2: Convert to fraction form
    21,635.38/29,858.94 = 13,135.54/x
  3. Step 3: Cross multiply
    21,635.38x = 29,858.94 × 13,135.54
  4. Step 4: Simplify right side
    21,635.38x = 392,213,300.73
  5. Step 5: Solve for x
    x = 392,213,300.73/21,635.38
  6. Step 6: Final answer
    x = 18,128.33

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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.