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Finding the Fourth Proportional to 19,908.70, 29,859.78 and 7,425.46

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Solution

The fourth proportional to 19,908.70, 29,859.78 and 7,425.46 is: 11,136.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,908.70 : 29,859.78 = 7,425.46 : x
  2. Step 2: Convert to fraction form
    19,908.70/29,859.78 = 7,425.46/x
  3. Step 3: Cross multiply
    19,908.70x = 29,859.78 × 7,425.46
  4. Step 4: Simplify right side
    19,908.70x = 221,722,602.00
  5. Step 5: Solve for x
    x = 221,722,602.00/19,908.70
  6. Step 6: Final answer
    x = 11,136.97

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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.