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Finding the Fourth Proportional to 8,961.82, 13,443.12 and 3,118.88

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Solution

The fourth proportional to 8,961.82, 13,443.12 and 3,118.88 is: 4,678.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,961.82 : 13,443.12 = 3,118.88 : x
  2. Step 2: Convert to fraction form
    8,961.82/13,443.12 = 3,118.88/x
  3. Step 3: Cross multiply
    8,961.82x = 13,443.12 × 3,118.88
  4. Step 4: Simplify right side
    8,961.82x = 41,927,478.11
  5. Step 5: Solve for x
    x = 41,927,478.11/8,961.82
  6. Step 6: Final answer
    x = 4,678.46

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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.