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Finding the Fourth Proportional to 18,645.99, 27,982.95 and 11,636.25

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Solution

The fourth proportional to 18,645.99, 27,982.95 and 11,636.25 is: 17,463.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.99 : 27,982.95 = 11,636.25 : x
  2. Step 2: Convert to fraction form
    18,645.99/27,982.95 = 11,636.25/x
  3. Step 3: Cross multiply
    18,645.99x = 27,982.95 × 11,636.25
  4. Step 4: Simplify right side
    18,645.99x = 325,616,601.94
  5. Step 5: Solve for x
    x = 325,616,601.94/18,645.99
  6. Step 6: Final answer
    x = 17,463.09

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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.