Home / 28,786.60-43,192.32-20,897.88

Finding the Fourth Proportional to 28,786.60, 43,192.32 and 20,897.88

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Solution

The fourth proportional to 28,786.60, 43,192.32 and 20,897.88 is: 31,355.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,786.60 : 43,192.32 = 20,897.88 : x
  2. Step 2: Convert to fraction form
    28,786.60/43,192.32 = 20,897.88/x
  3. Step 3: Cross multiply
    28,786.60x = 43,192.32 × 20,897.88
  4. Step 4: Simplify right side
    28,786.60x = 902,627,920.28
  5. Step 5: Solve for x
    x = 902,627,920.28/28,786.60
  6. Step 6: Final answer
    x = 31,355.84

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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.