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Finding the Fourth Proportional to 8,664.76, 11,958.80 and 6,441.40

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Solution

The fourth proportional to 8,664.76, 11,958.80 and 6,441.40 is: 8,890.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.76 : 11,958.80 = 6,441.40 : x
  2. Step 2: Convert to fraction form
    8,664.76/11,958.80 = 6,441.40/x
  3. Step 3: Cross multiply
    8,664.76x = 11,958.80 × 6,441.40
  4. Step 4: Simplify right side
    8,664.76x = 77,031,414.32
  5. Step 5: Solve for x
    x = 77,031,414.32/8,664.76
  6. Step 6: Final answer
    x = 8,890.20

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.