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Finding the Fourth Proportional to 18,615.33, 27,928.21 and 7,529.80

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Solution

The fourth proportional to 18,615.33, 27,928.21 and 7,529.80 is: 11,296.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.33 : 27,928.21 = 7,529.80 : x
  2. Step 2: Convert to fraction form
    18,615.33/27,928.21 = 7,529.80/x
  3. Step 3: Cross multiply
    18,615.33x = 27,928.21 × 7,529.80
  4. Step 4: Simplify right side
    18,615.33x = 210,293,835.66
  5. Step 5: Solve for x
    x = 210,293,835.66/18,615.33
  6. Step 6: Final answer
    x = 11,296.81

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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.