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Finding the Fourth Proportional to 19,986.39, 29,997.81 and 8,891.01

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Solution

The fourth proportional to 19,986.39, 29,997.81 and 8,891.01 is: 13,344.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.39 : 29,997.81 = 8,891.01 : x
  2. Step 2: Convert to fraction form
    19,986.39/29,997.81 = 8,891.01/x
  3. Step 3: Cross multiply
    19,986.39x = 29,997.81 × 8,891.01
  4. Step 4: Simplify right side
    19,986.39x = 266,710,828.69
  5. Step 5: Solve for x
    x = 266,710,828.69/19,986.39
  6. Step 6: Final answer
    x = 13,344.62

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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.