Home / 20,838.36-28,747.80-12,450

Finding the Fourth Proportional to 20,838.36, 28,747.80 and 12,450

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Solution

The fourth proportional to 20,838.36, 28,747.80 and 12,450 is: 17,175.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.36 : 28,747.80 = 12,450 : x
  2. Step 2: Convert to fraction form
    20,838.36/28,747.80 = 12,450/x
  3. Step 3: Cross multiply
    20,838.36x = 28,747.80 × 12,450
  4. Step 4: Simplify right side
    20,838.36x = 357,910,110
  5. Step 5: Solve for x
    x = 357,910,110/20,838.36
  6. Step 6: Final answer
    x = 17,175.54

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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.