Home / 21,388.24-29,517.96-13,436.56

Finding the Fourth Proportional to 21,388.24, 29,517.96 and 13,436.56

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Solution

The fourth proportional to 21,388.24, 29,517.96 and 13,436.56 is: 18,543.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.24 : 29,517.96 = 13,436.56 : x
  2. Step 2: Convert to fraction form
    21,388.24/29,517.96 = 13,436.56/x
  3. Step 3: Cross multiply
    21,388.24x = 29,517.96 × 13,436.56
  4. Step 4: Simplify right side
    21,388.24x = 396,619,840.62
  5. Step 5: Solve for x
    x = 396,619,840.62/21,388.24
  6. Step 6: Final answer
    x = 18,543.83

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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.