Home / 21,144.70-29,171.39-13,589.98

Finding the Fourth Proportional to 21,144.70, 29,171.39 and 13,589.98

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Solution

The fourth proportional to 21,144.70, 29,171.39 and 13,589.98 is: 18,748.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.70 : 29,171.39 = 13,589.98 : x
  2. Step 2: Convert to fraction form
    21,144.70/29,171.39 = 13,589.98/x
  3. Step 3: Cross multiply
    21,144.70x = 29,171.39 × 13,589.98
  4. Step 4: Simplify right side
    21,144.70x = 396,438,542.24
  5. Step 5: Solve for x
    x = 396,438,542.24/21,144.70
  6. Step 6: Final answer
    x = 18,748.84

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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.