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Finding the Fourth Proportional to 11,969.58, 17,955.30 and 3,648.90

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Solution

The fourth proportional to 11,969.58, 17,955.30 and 3,648.90 is: 5,473.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,969.58 : 17,955.30 = 3,648.90 : x
  2. Step 2: Convert to fraction form
    11,969.58/17,955.30 = 3,648.90/x
  3. Step 3: Cross multiply
    11,969.58x = 17,955.30 × 3,648.90
  4. Step 4: Simplify right side
    11,969.58x = 65,517,094.17
  5. Step 5: Solve for x
    x = 65,517,094.17/11,969.58
  6. Step 6: Final answer
    x = 5,473.63

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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.