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Finding the Fourth Proportional to 39,568, 54,607.68 and 21,904

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Solution

The fourth proportional to 39,568, 54,607.68 and 21,904 is: 30,229.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,568 : 54,607.68 = 21,904 : x
  2. Step 2: Convert to fraction form
    39,568/54,607.68 = 21,904/x
  3. Step 3: Cross multiply
    39,568x = 54,607.68 × 21,904
  4. Step 4: Simplify right side
    39,568x = 1,196,126,622.72
  5. Step 5: Solve for x
    x = 1,196,126,622.72/39,568
  6. Step 6: Final answer
    x = 30,229.65

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Why These Related Problems?

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