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Finding the Fourth Proportional to 18,708.64, 28,063.22 and 6,228.70

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Solution

The fourth proportional to 18,708.64, 28,063.22 and 6,228.70 is: 9,343.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.64 : 28,063.22 = 6,228.70 : x
  2. Step 2: Convert to fraction form
    18,708.64/28,063.22 = 6,228.70/x
  3. Step 3: Cross multiply
    18,708.64x = 28,063.22 × 6,228.70
  4. Step 4: Simplify right side
    18,708.64x = 174,797,378.41
  5. Step 5: Solve for x
    x = 174,797,378.41/18,708.64
  6. Step 6: Final answer
    x = 9,343.14

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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.