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Finding the Fourth Proportional to 17,990.81, 26,958.88 and 11,397.00

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Solution

The fourth proportional to 17,990.81, 26,958.88 and 11,397.00 is: 17,078.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,990.81 : 26,958.88 = 11,397.00 : x
  2. Step 2: Convert to fraction form
    17,990.81/26,958.88 = 11,397.00/x
  3. Step 3: Cross multiply
    17,990.81x = 26,958.88 × 11,397.00
  4. Step 4: Simplify right side
    17,990.81x = 307,250,406.59
  5. Step 5: Solve for x
    x = 307,250,406.59/17,990.81
  6. Step 6: Final answer
    x = 17,078.19

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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.