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Finding the Fourth Proportional to 19,935.87, 29,891.43 and 7,449.45

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Solution

The fourth proportional to 19,935.87, 29,891.43 and 7,449.45 is: 11,169.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,935.87 : 29,891.43 = 7,449.45 : x
  2. Step 2: Convert to fraction form
    19,935.87/29,891.43 = 7,449.45/x
  3. Step 3: Cross multiply
    19,935.87x = 29,891.43 × 7,449.45
  4. Step 4: Simplify right side
    19,935.87x = 222,674,713.21
  5. Step 5: Solve for x
    x = 222,674,713.21/19,935.87
  6. Step 6: Final answer
    x = 11,169.55

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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.