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Finding the Fourth Proportional to 20,603.94, 30,905.91 and 11,833.26

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Solution

The fourth proportional to 20,603.94, 30,905.91 and 11,833.26 is: 17,749.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.94 : 30,905.91 = 11,833.26 : x
  2. Step 2: Convert to fraction form
    20,603.94/30,905.91 = 11,833.26/x
  3. Step 3: Cross multiply
    20,603.94x = 30,905.91 × 11,833.26
  4. Step 4: Simplify right side
    20,603.94x = 365,717,668.57
  5. Step 5: Solve for x
    x = 365,717,668.57/20,603.94
  6. Step 6: Final answer
    x = 17,749.89

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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.