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Finding the Fourth Proportional to 20,900.09, 28,842.05 and 11,468.81

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Solution

The fourth proportional to 20,900.09, 28,842.05 and 11,468.81 is: 15,826.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.09 : 28,842.05 = 11,468.81 : x
  2. Step 2: Convert to fraction form
    20,900.09/28,842.05 = 11,468.81/x
  3. Step 3: Cross multiply
    20,900.09x = 28,842.05 × 11,468.81
  4. Step 4: Simplify right side
    20,900.09x = 330,783,934.12
  5. Step 5: Solve for x
    x = 330,783,934.12/20,900.09
  6. Step 6: Final answer
    x = 15,826.91

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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.