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Finding the Fourth Proportional to 11,772, 17,658 and 4,367.88

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Solution

The fourth proportional to 11,772, 17,658 and 4,367.88 is: 6,551.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,772 : 17,658 = 4,367.88 : x
  2. Step 2: Convert to fraction form
    11,772/17,658 = 4,367.88/x
  3. Step 3: Cross multiply
    11,772x = 17,658 × 4,367.88
  4. Step 4: Simplify right side
    11,772x = 77,128,025.04
  5. Step 5: Solve for x
    x = 77,128,025.04/11,772
  6. Step 6: Final answer
    x = 6,551.82

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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.