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Finding the Fourth Proportional to 36,639.63, 54,964.89 and 11,672.28

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Solution

The fourth proportional to 36,639.63, 54,964.89 and 11,672.28 is: 17,510.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,639.63 : 54,964.89 = 11,672.28 : x
  2. Step 2: Convert to fraction form
    36,639.63/54,964.89 = 11,672.28/x
  3. Step 3: Cross multiply
    36,639.63x = 54,964.89 × 11,672.28
  4. Step 4: Simplify right side
    36,639.63x = 641,565,586.25
  5. Step 5: Solve for x
    x = 641,565,586.25/36,639.63
  6. Step 6: Final answer
    x = 17,510.15

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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.