Home / 20,843.07-28,768.50-12,880.50

Finding the Fourth Proportional to 20,843.07, 28,768.50 and 12,880.50

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Solution

The fourth proportional to 20,843.07, 28,768.50 and 12,880.50 is: 17,778.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.07 : 28,768.50 = 12,880.50 : x
  2. Step 2: Convert to fraction form
    20,843.07/28,768.50 = 12,880.50/x
  3. Step 3: Cross multiply
    20,843.07x = 28,768.50 × 12,880.50
  4. Step 4: Simplify right side
    20,843.07x = 370,552,664.25
  5. Step 5: Solve for x
    x = 370,552,664.25/20,843.07
  6. Step 6: Final answer
    x = 17,778.22

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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.