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Finding the Fourth Proportional to 20,558.76, 28,370.88 and 11,606.07

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Solution

The fourth proportional to 20,558.76, 28,370.88 and 11,606.07 is: 16,016.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.76 : 28,370.88 = 11,606.07 : x
  2. Step 2: Convert to fraction form
    20,558.76/28,370.88 = 11,606.07/x
  3. Step 3: Cross multiply
    20,558.76x = 28,370.88 × 11,606.07
  4. Step 4: Simplify right side
    20,558.76x = 329,274,419.24
  5. Step 5: Solve for x
    x = 329,274,419.24/20,558.76
  6. Step 6: Final answer
    x = 16,016.26

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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.