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Finding the Fourth Proportional to 40,568, 60,859.68 and 18,680

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Solution

The fourth proportional to 40,568, 60,859.68 and 18,680 is: 28,023.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,568 : 60,859.68 = 18,680 : x
  2. Step 2: Convert to fraction form
    40,568/60,859.68 = 18,680/x
  3. Step 3: Cross multiply
    40,568x = 60,859.68 × 18,680
  4. Step 4: Simplify right side
    40,568x = 1,136,858,822.40
  5. Step 5: Solve for x
    x = 1,136,858,822.40/40,568
  6. Step 6: Final answer
    x = 28,023.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.