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Finding the Fourth Proportional to 43,806.39, 65,711.75 and 12,216.39

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Solution

The fourth proportional to 43,806.39, 65,711.75 and 12,216.39 is: 18,325.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,806.39 : 65,711.75 = 12,216.39 : x
  2. Step 2: Convert to fraction form
    43,806.39/65,711.75 = 12,216.39/x
  3. Step 3: Cross multiply
    43,806.39x = 65,711.75 × 12,216.39
  4. Step 4: Simplify right side
    43,806.39x = 802,760,304.50
  5. Step 5: Solve for x
    x = 802,760,304.50/43,806.39
  6. Step 6: Final answer
    x = 18,325.19

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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.