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Finding the Fourth Proportional to 18,253.99, 27,380.99 and 7,721.28

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Solution

The fourth proportional to 18,253.99, 27,380.99 and 7,721.28 is: 11,581.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,253.99 : 27,380.99 = 7,721.28 : x
  2. Step 2: Convert to fraction form
    18,253.99/27,380.99 = 7,721.28/x
  3. Step 3: Cross multiply
    18,253.99x = 27,380.99 × 7,721.28
  4. Step 4: Simplify right side
    18,253.99x = 211,416,309.77
  5. Step 5: Solve for x
    x = 211,416,309.77/18,253.99
  6. Step 6: Final answer
    x = 11,581.92

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Similar ratio
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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.