Home / 20,769.64-28,663.77-11,819.86

Finding the Fourth Proportional to 20,769.64, 28,663.77 and 11,819.86

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Solution

The fourth proportional to 20,769.64, 28,663.77 and 11,819.86 is: 16,312.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.64 : 28,663.77 = 11,819.86 : x
  2. Step 2: Convert to fraction form
    20,769.64/28,663.77 = 11,819.86/x
  3. Step 3: Cross multiply
    20,769.64x = 28,663.77 × 11,819.86
  4. Step 4: Simplify right side
    20,769.64x = 338,801,748.47
  5. Step 5: Solve for x
    x = 338,801,748.47/20,769.64
  6. Step 6: Final answer
    x = 16,312.36

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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.