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Finding the Fourth Proportional to 11,845.80, 17,772.30 and 6,648.20

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Solution

The fourth proportional to 11,845.80, 17,772.30 and 6,648.20 is: 9,974.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,845.80 : 17,772.30 = 6,648.20 : x
  2. Step 2: Convert to fraction form
    11,845.80/17,772.30 = 6,648.20/x
  3. Step 3: Cross multiply
    11,845.80x = 17,772.30 × 6,648.20
  4. Step 4: Simplify right side
    11,845.80x = 118,153,804.86
  5. Step 5: Solve for x
    x = 118,153,804.86/11,845.80
  6. Step 6: Final answer
    x = 9,974.32

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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.