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Finding the Fourth Proportional to 8,778, 13,169.28 and 2,622

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Solution

The fourth proportional to 8,778, 13,169.28 and 2,622 is: 3,933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778 : 13,169.28 = 2,622 : x
  2. Step 2: Convert to fraction form
    8,778/13,169.28 = 2,622/x
  3. Step 3: Cross multiply
    8,778x = 13,169.28 × 2,622
  4. Step 4: Simplify right side
    8,778x = 34,529,852.16
  5. Step 5: Solve for x
    x = 34,529,852.16/8,778
  6. Step 6: Final answer
    x = 3,933.68

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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.