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Finding the Fourth Proportional to 19,794.12, 29,696.64 and 9,921.48

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Solution

The fourth proportional to 19,794.12, 29,696.64 and 9,921.48 is: 14,884.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,794.12 : 29,696.64 = 9,921.48 : x
  2. Step 2: Convert to fraction form
    19,794.12/29,696.64 = 9,921.48/x
  3. Step 3: Cross multiply
    19,794.12x = 29,696.64 × 9,921.48
  4. Step 4: Simplify right side
    19,794.12x = 294,634,619.83
  5. Step 5: Solve for x
    x = 294,634,619.83/19,794.12
  6. Step 6: Final answer
    x = 14,884.96

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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.