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Finding the Fourth Proportional to 8,718.88, 13,054 and 6,660.64

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Solution

The fourth proportional to 8,718.88, 13,054 and 6,660.64 is: 9,972.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.88 : 13,054 = 6,660.64 : x
  2. Step 2: Convert to fraction form
    8,718.88/13,054 = 6,660.64/x
  3. Step 3: Cross multiply
    8,718.88x = 13,054 × 6,660.64
  4. Step 4: Simplify right side
    8,718.88x = 86,947,994.56
  5. Step 5: Solve for x
    x = 86,947,994.56/8,718.88
  6. Step 6: Final answer
    x = 9,972.38

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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.