Home / 20,872.69-31,230.41-14,645.00

Finding the Fourth Proportional to 20,872.69, 31,230.41 and 14,645.00

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Solution

The fourth proportional to 20,872.69, 31,230.41 and 14,645.00 is: 21,912.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.69 : 31,230.41 = 14,645.00 : x
  2. Step 2: Convert to fraction form
    20,872.69/31,230.41 = 14,645.00/x
  3. Step 3: Cross multiply
    20,872.69x = 31,230.41 × 14,645.00
  4. Step 4: Simplify right side
    20,872.69x = 457,369,441.68
  5. Step 5: Solve for x
    x = 457,369,441.68/20,872.69
  6. Step 6: Final answer
    x = 21,912.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.