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Finding the Fourth Proportional to 18,668.76, 28,003.68 and 4,817.76

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Solution

The fourth proportional to 18,668.76, 28,003.68 and 4,817.76 is: 7,226.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.76 : 28,003.68 = 4,817.76 : x
  2. Step 2: Convert to fraction form
    18,668.76/28,003.68 = 4,817.76/x
  3. Step 3: Cross multiply
    18,668.76x = 28,003.68 × 4,817.76
  4. Step 4: Simplify right side
    18,668.76x = 134,915,009.36
  5. Step 5: Solve for x
    x = 134,915,009.36/18,668.76
  6. Step 6: Final answer
    x = 7,226.78

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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.