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Finding the Fourth Proportional to 33,078.16, 45,628.68 and 21,749.68

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Solution

The fourth proportional to 33,078.16, 45,628.68 and 21,749.68 is: 30,001.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,078.16 : 45,628.68 = 21,749.68 : x
  2. Step 2: Convert to fraction form
    33,078.16/45,628.68 = 21,749.68/x
  3. Step 3: Cross multiply
    33,078.16x = 45,628.68 × 21,749.68
  4. Step 4: Simplify right side
    33,078.16x = 992,409,188.82
  5. Step 5: Solve for x
    x = 992,409,188.82/33,078.16
  6. Step 6: Final answer
    x = 30,001.95

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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.