Home / 20,379.50-28,170.78-17,002.62

Finding the Fourth Proportional to 20,379.50, 28,170.78 and 17,002.62

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Solution

The fourth proportional to 20,379.50, 28,170.78 and 17,002.62 is: 23,502.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.50 : 28,170.78 = 17,002.62 : x
  2. Step 2: Convert to fraction form
    20,379.50/28,170.78 = 17,002.62/x
  3. Step 3: Cross multiply
    20,379.50x = 28,170.78 × 17,002.62
  4. Step 4: Simplify right side
    20,379.50x = 478,977,067.44
  5. Step 5: Solve for x
    x = 478,977,067.44/20,379.50
  6. Step 6: Final answer
    x = 23,502.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.