Home / 21,109.23-29,118.04-13,939.21

Finding the Fourth Proportional to 21,109.23, 29,118.04 and 13,939.21

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Solution

The fourth proportional to 21,109.23, 29,118.04 and 13,939.21 is: 19,227.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.23 : 29,118.04 = 13,939.21 : x
  2. Step 2: Convert to fraction form
    21,109.23/29,118.04 = 13,939.21/x
  3. Step 3: Cross multiply
    21,109.23x = 29,118.04 × 13,939.21
  4. Step 4: Simplify right side
    21,109.23x = 405,882,474.35
  5. Step 5: Solve for x
    x = 405,882,474.35/21,109.23
  6. Step 6: Final answer
    x = 19,227.73

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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.