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Finding the Fourth Proportional to 19,891.98, 29,837.97 and 11,143.98

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Solution

The fourth proportional to 19,891.98, 29,837.97 and 11,143.98 is: 16,715.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.98 : 29,837.97 = 11,143.98 : x
  2. Step 2: Convert to fraction form
    19,891.98/29,837.97 = 11,143.98/x
  3. Step 3: Cross multiply
    19,891.98x = 29,837.97 × 11,143.98
  4. Step 4: Simplify right side
    19,891.98x = 332,513,740.92
  5. Step 5: Solve for x
    x = 332,513,740.92/19,891.98
  6. Step 6: Final answer
    x = 16,715.97

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1.5x scale

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.