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Finding the Fourth Proportional to 18,663.27, 27,980.96 and 11,265.99

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Solution

The fourth proportional to 18,663.27, 27,980.96 and 11,265.99 is: 16,890.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.27 : 27,980.96 = 11,265.99 : x
  2. Step 2: Convert to fraction form
    18,663.27/27,980.96 = 11,265.99/x
  3. Step 3: Cross multiply
    18,663.27x = 27,980.96 × 11,265.99
  4. Step 4: Simplify right side
    18,663.27x = 315,233,159.22
  5. Step 5: Solve for x
    x = 315,233,159.22/18,663.27
  6. Step 6: Final answer
    x = 16,890.56

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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.