Home / 21,939.88-30,257.88-15,553.84

Finding the Fourth Proportional to 21,939.88, 30,257.88 and 15,553.84

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Solution

The fourth proportional to 21,939.88, 30,257.88 and 15,553.84 is: 21,450.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.88 : 30,257.88 = 15,553.84 : x
  2. Step 2: Convert to fraction form
    21,939.88/30,257.88 = 15,553.84/x
  3. Step 3: Cross multiply
    21,939.88x = 30,257.88 × 15,553.84
  4. Step 4: Simplify right side
    21,939.88x = 470,626,224.26
  5. Step 5: Solve for x
    x = 470,626,224.26/21,939.88
  6. Step 6: Final answer
    x = 21,450.72

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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.