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Finding the Fourth Proportional to 20,564.76, 28,379.56 and 11,133.52

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Solution

The fourth proportional to 20,564.76, 28,379.56 and 11,133.52 is: 15,364.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,564.76 : 28,379.56 = 11,133.52 : x
  2. Step 2: Convert to fraction form
    20,564.76/28,379.56 = 11,133.52/x
  3. Step 3: Cross multiply
    20,564.76x = 28,379.56 × 11,133.52
  4. Step 4: Simplify right side
    20,564.76x = 315,964,398.85
  5. Step 5: Solve for x
    x = 315,964,398.85/20,564.76
  6. Step 6: Final answer
    x = 15,364.36

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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.