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Finding the Fourth Proportional to 18,708.67, 28,062.87 and 4,668.61

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Solution

The fourth proportional to 18,708.67, 28,062.87 and 4,668.61 is: 7,002.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.67 : 28,062.87 = 4,668.61 : x
  2. Step 2: Convert to fraction form
    18,708.67/28,062.87 = 4,668.61/x
  3. Step 3: Cross multiply
    18,708.67x = 28,062.87 × 4,668.61
  4. Step 4: Simplify right side
    18,708.67x = 131,014,595.51
  5. Step 5: Solve for x
    x = 131,014,595.51/18,708.67
  6. Step 6: Final answer
    x = 7,002.88

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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.