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Finding the Fourth Proportional to 19,956.76, 29,918.82 and 8,263.64

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Solution

The fourth proportional to 19,956.76, 29,918.82 and 8,263.64 is: 12,388.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,956.76 : 29,918.82 = 8,263.64 : x
  2. Step 2: Convert to fraction form
    19,956.76/29,918.82 = 8,263.64/x
  3. Step 3: Cross multiply
    19,956.76x = 29,918.82 × 8,263.64
  4. Step 4: Simplify right side
    19,956.76x = 247,238,357.70
  5. Step 5: Solve for x
    x = 247,238,357.70/19,956.76
  6. Step 6: Final answer
    x = 12,388.70

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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.