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Finding the Fourth Proportional to 40,857.79, 61,290.22 and 11,275.63

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Solution

The fourth proportional to 40,857.79, 61,290.22 and 11,275.63 is: 16,914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,857.79 : 61,290.22 = 11,275.63 : x
  2. Step 2: Convert to fraction form
    40,857.79/61,290.22 = 11,275.63/x
  3. Step 3: Cross multiply
    40,857.79x = 61,290.22 × 11,275.63
  4. Step 4: Simplify right side
    40,857.79x = 691,085,661.92
  5. Step 5: Solve for x
    x = 691,085,661.92/40,857.79
  6. Step 6: Final answer
    x = 16,914.42

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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.