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Finding the Fourth Proportional to 8,878.61, 13,320.00 and 2,638.68

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Solution

The fourth proportional to 8,878.61, 13,320.00 and 2,638.68 is: 3,958.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.61 : 13,320.00 = 2,638.68 : x
  2. Step 2: Convert to fraction form
    8,878.61/13,320.00 = 2,638.68/x
  3. Step 3: Cross multiply
    8,878.61x = 13,320.00 × 2,638.68
  4. Step 4: Simplify right side
    8,878.61x = 35,147,175.07
  5. Step 5: Solve for x
    x = 35,147,175.07/8,878.61
  6. Step 6: Final answer
    x = 3,958.63

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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.