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Finding the Fourth Proportional to 11,747, 17,620.50 and 3,955.81

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Solution

The fourth proportional to 11,747, 17,620.50 and 3,955.81 is: 5,933.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,747 : 17,620.50 = 3,955.81 : x
  2. Step 2: Convert to fraction form
    11,747/17,620.50 = 3,955.81/x
  3. Step 3: Cross multiply
    11,747x = 17,620.50 × 3,955.81
  4. Step 4: Simplify right side
    11,747x = 69,703,350.11
  5. Step 5: Solve for x
    x = 69,703,350.11/11,747
  6. Step 6: Final answer
    x = 5,933.72

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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.