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Finding the Fourth Proportional to 40,665.76, 60,991.72 and 11,076.68

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Solution

The fourth proportional to 40,665.76, 60,991.72 and 11,076.68 is: 16,613.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,665.76 : 60,991.72 = 11,076.68 : x
  2. Step 2: Convert to fraction form
    40,665.76/60,991.72 = 11,076.68/x
  3. Step 3: Cross multiply
    40,665.76x = 60,991.72 × 11,076.68
  4. Step 4: Simplify right side
    40,665.76x = 675,585,473.98
  5. Step 5: Solve for x
    x = 675,585,473.98/40,665.76
  6. Step 6: Final answer
    x = 16,613.13

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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.