Home / 20,783.22-28,691.19-12,829.83

Finding the Fourth Proportional to 20,783.22, 28,691.19 and 12,829.83

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Solution

The fourth proportional to 20,783.22, 28,691.19 and 12,829.83 is: 17,711.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.22 : 28,691.19 = 12,829.83 : x
  2. Step 2: Convert to fraction form
    20,783.22/28,691.19 = 12,829.83/x
  3. Step 3: Cross multiply
    20,783.22x = 28,691.19 × 12,829.83
  4. Step 4: Simplify right side
    20,783.22x = 368,103,090.20
  5. Step 5: Solve for x
    x = 368,103,090.20/20,783.22
  6. Step 6: Final answer
    x = 17,711.55

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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.