Home / 20,789.22-28,719.48-17,989.86

Finding the Fourth Proportional to 20,789.22, 28,719.48 and 17,989.86

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Solution

The fourth proportional to 20,789.22, 28,719.48 and 17,989.86 is: 24,852.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.22 : 28,719.48 = 17,989.86 : x
  2. Step 2: Convert to fraction form
    20,789.22/28,719.48 = 17,989.86/x
  3. Step 3: Cross multiply
    20,789.22x = 28,719.48 × 17,989.86
  4. Step 4: Simplify right side
    20,789.22x = 516,659,424.47
  5. Step 5: Solve for x
    x = 516,659,424.47/20,789.22
  6. Step 6: Final answer
    x = 24,852.28

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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.