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Finding the Fourth Proportional to 20,128.83, 27,774.83 and 11,176.41

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Solution

The fourth proportional to 20,128.83, 27,774.83 and 11,176.41 is: 15,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.83 : 27,774.83 = 11,176.41 : x
  2. Step 2: Convert to fraction form
    20,128.83/27,774.83 = 11,176.41/x
  3. Step 3: Cross multiply
    20,128.83x = 27,774.83 × 11,176.41
  4. Step 4: Simplify right side
    20,128.83x = 310,422,831.88
  5. Step 5: Solve for x
    x = 310,422,831.88/20,128.83
  6. Step 6: Final answer
    x = 15,421.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.